I have watched several lectures regarding dark matter etc., and I have never felt I had a good understanding until this one. The lecturer reminds me of Feynman in that he is able to explain things in very clear terms without dumbing things down or talking down to us non-physicists, he remains very precise about what he says but finds a way to help me to grasp it. Superb lecture, I hope I can find more by Mr. Filippenko.
If you want to see more by Mr. Filippenko, then watch the tv series, "The Universe", the only thing the history channel ever made of any actual value. He's basically the icon of that show, he's on it constantly.
A million miles over my head but couldn't stop watching. Bonus points for answering a question that's been bugging me forever, why in an expanding universe, the Andromeda Galaxy will collide with ours.
Hi Alex, questions ------------- Does time flow with different rate among afar space and empty space close to a galaxy? Do time-flow differences between empty space of relatively dense regions and afar voids, affect dark matter and dark energy? Is dark matter and dark energy an effect of time on the Planck noise rate of particle generation that fail to cancel each other? If space dilates faster at some regions, then not only there is pitch lowering of fields, but also informational elongation of transmitted data. Also all fields do NOT dilate with the same rate, some fields like the Higgs field hate to dilate, so that friction among fields can generate or consume spacetime. [inconsequent dilation among fields effect] How does informational dilation of single fields [and also among different fields] affect the size of empty space? How space chunks of different time flow interact among each other? How now inside one space chunk fields that exist in that single one field react among each other [the fields of a single space chunk] with their different properties during dilation and space consumation? What affects has "among fields interaction" to spacetime of that region we observe? : ) have a nice day
Professor Filippenko is the best teacher I've ever had, utterly the best! It's good to see him sharing himself in talks like this so other people can get some of his awesomeness.
Don Mueller below gave me the perfect excuse not to say anything after watching this, except that I think Dr. F is a fascinating speaker. Nice Job Doc!
2nd time watching this lecture, great professor! You should get him back to talk about multiverse, which he also offered in this video to come back and talk about.
Nice lecture. Dark energy expanding universe faster and faster, so "big rip" is the end of the universe. Some believing in "big bounce" which is constant/endless big bangs extracting/retracing of the universe. Considering new theories of parallel universes and unreal world of quantum mechanics raising many questions about reality we live in....getting even more interesting.
Surprising that for a scientist he cares about whether or not other people appreciate his work. I would imagine that scientists are only concerned with research, proofs and evidence and not people that either like or disklike their work.
I started watching Dr. Alex Filippenko's Google talk on "Dark Energy and the Runaway Universe" and at around the 10:00 mark he talks about the possible deaths of our universe. I've researched the Big Crunch theory before and was sort of confused when Dr. Filippenko showed the graph at the 10:15 mark. The reason I'm confused is because I am relying on the assumption that time is a just a representation of the expansion of space (spacetime), meaning if the expansion is outward then time will be moving forward and if expansion stops then time will stop. My question and/or critique is why time continues to move forward in his Big Crunch (red line/arrow) graph plot? Shouldn't the Big Crunch plot look like a unit circle from pi to pi/2 until it reaches the stopping point and then reverse from pi/2 back to pi and then repeat that cycle endlessly? Similarly at 10:35 he explains how if you could observe the Big Crunch you would see galaxies assemble and expand, then reach a stopping point, then reverse and dissemble. If I'm right about time reversing during the Big Crunch, wouldn't you not be able to witness the Big Crunch because consciousness (time-dependent neuron interactions) wouldn't be accessible, or in other words we wouldn't be able to process/reflect on what we're seeing?
Time is created by the speed difference between slow resting mass energy (that includes you and me) and fast light speed energy. As you you move faster toward the speed of light your time continues to slow until you reach light speed, at which your time stops and does not move forward or back. The speed of light aka universal constant is one anchor point in time with you being the other. This is why everyone experiences time on a unique personal basis. You are the other anchor point. All matter is one anchor point in time and is why all matter ages. The gap that is created between slow resting mass energy and faster light speed energy (xrays, light, gamma rays, radio waves, etc) is what we call 3D space. At the speed of light both time and distance are zero. The earth has a diameter of zero! Both space and time rely on this matter to constant relationship. One mechanism makes both, which is why time and space are dynamically connected. It’s cool how one matter to light speed (universal constant) mechanism can make something that is 1D and something 3D. Gravity appears to be the interference of the full matter to constant relationship. Basically matter gets partially in the way of other matter thus causing a decrease in the expansion of space directly between the matter causing them to move directly together. For the full story (easy to read) (timespacegravity.quora.com/)
58:50 "So we think the Universe began with a quantum fluctuation of nothing." I like to hear Prof Filinppenko speak of the unfathomable. It helps me keep my arrogance in check.
What a bummer about the short-ass Q+A ... and the questions were so much better than those asked of Dr.Frieman who does this same lecture more or less, at Fermilab in 2016. Dr.Fillipenko is something else though, isn't he? Just as one would expect from a student of Dr.Sagan, may he RIP
Love his shirts. Filippenko is the archetype of the enthusiastic, slightly dorky, geek. His lecturing style is engaging and very effective. Check out - if you get a chance - his course on Astronomy on The Teaching Company's Great Courses.
“Gravitational worlds, they are moving or changing the orbit with all their family members depending on the nuclear of each other” According to rule of gravitation theory says that in the super cluster of galaxies, cluster of galaxies and galaxy, there are the black holes of other kinds of energy in the deep of gravitational world. They are moving or changing the orbit with all of their family members depending on the nuclear of each other. And in this rule; all the gravitation worlds of universe have become the victims of rolling or moving into the oval orbits of critical radius. The gravitational worlds of the nuclear circle of the gravitational worlds are expandable with other in the orbits around nucleus, resulting that the universe is expanding. So- The Universe is not expanding. Being the nuclear of the circle of the gravitational force, the visible worlds are going in distance from each other in the difference of movement on the critical radius. Using the telescope, Astronomer Edwin P. Hubble first observed the distribution of galaxies in space. Scientist discovered that the is expanding and lawfully, Nobel foundation gave Nobel Prize to the scientist in 1929. From the long time- People & Students have been receiving education- The Blunder discovery and in my research- results- it’s now 100% completed. The most important tale is that- The Universe not expanding faster than light yet our solar world orbiting expanding faster than light because solar worlds are in gravitational egg of super massive black hole. See at shahidurrahmansikder.wordpress.com/2010/01/18/edwin-p-hubble/
The width of the umbra does not usually exceed 106 kilometers, so you have to choose the right place to observe an eclipse. And seeing one of 80 or 90% is not comparable to seeing it 100%. You have to be on the path of totality.
Is there something that, automatically put subtitles on those kind of talks, super interesting, unfortunately my parents are only speaking/reading dutch, i want to show this kind of videos
does the "universal constant" for dark energy change over time, by expansion or contraction of the universe, locally or universally? Does a constant satisfy the equations, or does it need modifying in some large or small way to fit the data, across the birth to now data sets available?
Could it be that in the present, where we are right now, we are pushing and moving away from the rest instead of some big bang that have put things into motion and still expanding and pushing us away? So, how sure are we in determining where this motion is initiated from?
+thegreatmonster The big bang wasn't like an explosion where things move away from each other IN space. Instead it's space itself expanding. The naming of "big bang" is very misleading.
I believe dark energy is a positive pressure exerted by the vacuum energy of space-time, and that what we are calling dark matter is merely the effects of dark energy on regular matter. A positive pressure exerted by space-time's vacuum energy predicts; -the accelerating universe -the expanding universe -we should measure there to be more mass than we can see matter being accountable for -matter in the center of a galaxy / cluster should have added relativistic mass, increasing its gravitational attraction, as well as its escape velocity -matter in the outer regions of a galaxy / cluster should be moving faster than we predict, sometimes faster than our predicted maximum orbital speed without flying out of orbit.
In 1922 Friedmann first showed the expanding or contracting solution. Lemaître showed expanding solution. DeSitter showed Frame Dragging in Mass Object solution. In 1917 Vesto Slipher was first to observe Red Shift of Distant Galaxy. Hubble Constant was already published by Lemaître in 1927 which Hubble published in 1929. Hubble Constant predicted Accelerating Universe but it was not caught on till late. By 1929, however, the work of Hubble and others had shown that our universe is expanding. This is readily described by the expanding cosmological solutions found by Friedmann in 1922, which do not require a cosmological constant. Lemaître used these solutions to formulate the earliest version of the Big Bang models, in which our universe has evolved from an extremely hot and dense earlier state.[6] Einstein later declared the cosmological constant the biggest blunder of his life.[7
Alex Filippenko is an actual scientist? I thought he was just one of the people involved with making the only reputable show to ever come out of the history channel, "The Universe".
12:06 But isn't, according to one scientist that I forgot the name of (so no "appeal to authority" fallacy is intented), the Andromeda galaxy going to merge with our galaxy in the future? If the claim that it will merge with our galaxy, what does it means to the runaway universe theory? Does it refutes that theory or is there a explanation in the theory for such a case, like for example it is a anomaly that has a reasonable cause?
I need to watch this again for some clarifications, and perhaps you might get your answer that way too. But if it helps, what I heard is that on a "local" level - local being our galaxy in other words - gravity pulls planet and stars together. Yet on the larger, more vastly universal level, gravity gives way to expansion. So both exist; the perspective you are viewing from matters. Our individual or chosen reference point always influences the view, interpretation, and outcome... whether in the cosmos or in our daily life.
*pause* I'm wondering of Dark Energy: can it only expand so far in its "life," such as a star before changing behavior at its death? Could it begin collapsing upon itself at some point or retracting such as a rubber band? Just a thought before I forgot it. Thanks!
Based on everything we know about the universe, it changes in the most abrupt ways. Is all Dark Energy the same age? Would it occur simultaneously and equally across the universe? Breathing in and out.
I am concerned, that the description, of dark matter/energy is very similar to the properties of light (photons). they power gravity, matter and are energy, and have electro-magnetic properties.(proven by gravitational lensing of light) gravity has a limited distance after which solar wind (photonic pressure) would push matter including galaxies at an ever increasing rate. there are four locations that effect this push 1. in proximity to gravity 2. in the center of the universe where light from all directions push in all directions, 3. near the edge of the universe where the push is in all but one direction, and 4. outside the universe where all light is pushing out of the universe. thus the acceleration. (like the time it takes for a photon to escape from the center of the sun.) we can only see photons when they are coming to us but away we can not see. like escape velocity gravity's power has limits. but the universe has been being filled by photons since the big bang and the light from all the suns from all the galaxies. pushing against each other explains the expansion easily. energy is neither created nor destroyed. it joins with matter and is released from matter thus all photons from the beginning are still there traveling in space or locked in matter. space is static it is not expanding only the matter in it that is moving. a body in motion will stay in motion until reacted on by an outside force. (photonic pressure for thirteen billion years?) this will continue until all light is expended (escapes the universe's matter unless it finds something out there, but not likely or we would have evidence of the matter at the edge of the universe contacting something that slowed it down changing it's red shift,) then there will no longer be any acceleration. matter will continue at that rate. and lastly when matter is heated it changes from state to state ("atomic compressed" like a black hole, a solid, a liquid, a gas, and as plasma.) expanding until it cools
DARK ENERGY Authors Note When discussing the nature of the energy and matter that universally goes into the makeup of the Earth and the surrounding Cosmos, it is necessary to make a distinction between the fundamental particulates of energy which exist below the atomic threshold, and those particulates which exist at and above the atomic threshold. In order to make this distinction; I use two terms, macrocosm and macro-cosmic energy which refer to the larger non-pervading particulates existing at and above the level of the atom, and the two terms microcosm and microcosmic energy which refer to particulates existing below the level of the atom. Preliminary References Outer space From Wikipedia, the free encyclopedia For other uses, see Outer space (disambiguation). The interface between the Earth's surface and outer space. The Kármán line at a height of 100 km (62 mi) is shown. The layers of the atmosphere are drawn to scale, whereas objects within them, such as the International Space Station, are not.Outer space, or just space, is the expanse that exists between celestial bodies, including Earth. State of matter - Wikipediaen.wikipedia.org/wiki/State_of_matter In physics, a state of matter is one of the distinct forms in which matter can exist. Four states of matter are observable in everyday life: solid, liquid, gas, and plasma. From Wikipedia, the free encyclopedia The first observation of gravitational waves was made on 14 September 2015 and was announced by the LIGO and Virgo collaborations on 11 February 2016.[3][4][5]Previously gravitational waves had only been inferred indirectly, via their effect on the timing of pulsars in binary-star systems. DARK INVISIBLE ENERGY All four states of matter solid, liquid, gas, and plasma which go into the makeup of the cosmos, are comprised of elementary infinitesimally sized energy particulates at the fundamental microcosmic level of the cosmos; and larger atom particulates of at the physically apparent level of the macro-cosmos. Therefore, regardless as to whether we are discussing the natures of waterborne, airborne or electromagnetic waves travelling through outer-space, all waves of themselves are made up of particulates of energy, that can only propagate through a medium of particulates. As such, and given the recent observation of gravitational waves being produced by the collision of two black holes and propagating through outer-space, this event which was witnessed by multiple initial observers, and millions more via video recordings of this event taking place. This serves as being empirical proof, that outer-space is indeed made up of an invisible medium of energy particulates, which facilitate the transit of gravitational and other electromagnetic waves through outer-space. Further Proof Law of Physics For there to be an output of energy, there must be an input of energy. As such, it follows, that all forms of motion extending from those of infinitesimal vibrations, up to and beyond the orbital motions of particles around the nucleus of an atom, and planets around a star, all require an input of energy to fuel their motion. And the newly discovered gravitational waves, cannot be nor professed to be an exception to this ironclad and absolute rule of physics. Therefore given the fact that gravitational waves do require a medium of energy to facilitate their forward transit of motion through outer space, and an immediate and constant input of energy to fuel their forward transit of motion through outer space. So it becomes apparent, that it can only be, that it is the medium of energy that facilitates their forward motion of transit through space, which also serves as the input of energy to fuel and drive their directed forward motions through outer space, namely a non-detectable dark invisible form of energy. Additional Rational There are only two choices concerning the fundamental nature of outer-space. The first choice is as with the old schools of physics, which were of the belief that outer-space is an energy less void of nothingness. The second choice is as with the modern schools of physics, which are of the belief that ninety percent of the cosmos is comprised of dark invisible matter. However, confusion has reigned regarding this, as some physicists also refer to dark invisible matter as to being dark invisible energy. And additionally, the inappropriate use of the word mass and misinterpretations relating to the nature of mass has also served to add to the confusion (s). Hypothesis and rhetorical question relating to the fundamental nature of outer-space. If we were able to do the impossible, and use a remote control device to manifest (Note I am aware that it is impossible to manifest nothingness, as this is a contradiction in terms, however this is a hypothetical scenario, not a reality to be taken literally), a wave of particles or a body of matter within a totally energy-less void of nothingness, what would happen? All particles whether they exist within a wavelength or a body of matter *radiate energy outwardly from their structures*, and it is this output of energy that serves to facilitate their motions and their interactions with other particles. Therefore given the introduction of radiant energy particles into an energy-less void, they and their outputs of radiance would instantaneously blink out of existence as their energy dissipated into the void. Vis-a-vis Hypothesis If we were able to do the impossible, and use a remote control device to manifest an energy-less void of nothingness into the airless (devoid of atoms only) vacuum of a science laboratory bell jar. What would happen as a result? The radiant energy of the surrounding atoms of glass would instantaneously be drawn into the energy less void, and arguably the glass bell jar would either shatter, disintegrate or disappear into the nothingness that was within the bell jar. As Such Energy cannot exist within an energy-less void of nothingness. Energy-less nothingness cannot exist within anything (energy and matter). Conclusion: Dark Invisible Energy The vast majority of the cosmos exists in the form of fluidic all-pervading microcosmic energy particles, which serve to fuel the elementary particles of the gravitational electromagnetic spectrum, and facilitate the formation and the transit of their wavelengths throughout the cosmos. As Above So Below - All Things From Little Things Grow. Cosmic microcosmic ocean of energy particles and matter Planetary macro-cosmic oceans of water and fish. Planetary macro-cosmic oceans of gases and birds. Earth: Electromagnetic particles and atoms of solid matter. Wind: Electromagnetic particles and atoms of fluidic gaseous matter. Water: Electromagnetic particles and atoms of fluidic liquid matter. Fire: Electromagnetic radiant heatwave particles of deconstructing atomic matter. www.fromthecircletothesphere.net
How do I protect my scientific theory? My Idea is that if you considered the dark energy to be equally divided and surrounding every Planck sized bit, generated by the so called big bang, and causing the bit to oscillate at it's resonant frequency. Since it was a single particle they would FILL the existing gravity field, the Universe, instantly vibrating at an unimaginable high frequency generating a potential power so high I refuse to state the number I calculate. The size of the universe increases as the particle vibrating area increases and begins decreasing as they acquire mass through fusion with each other. In a few million years a large number of Galaxies form and the process continues to expand the Universe until the gravity of the Galaxies takes over and the Universe returns to the single particle. Then the crushing force of the entire Universe causes the cubic kilometer (guesstimate) containing approximately 2.5 X 10^104 particles per cubic meter to implode and .....REPEAT.... This fits the string theory and the complex oscillations, that you like, are derived relying on Time as the ONLY added dimension. What happens next is? (note) A cubic kilometer contains 15 X 10 ^ 1124864 particles, that may be too much for one universe
***** i have been around for over 80 years. I have seen the results of hundreds of predictions by super scientists the great Einstein is now being challenged by new findings. Many who challenged him in his time are being proven correct. Education does not lead to knowledge. Think for instance of ALL our educated politicians and what greatness they bring to our country. I have no faith in mathphysics physics result in negatives which can not exist in the physic..al world. We can only exist in the physical world. You sound like our brilliant representative to Congress from California. She said that the proposed law was 2700 pages and she didn't read it. JUST VOTE FOR IT. WE CAN FIND OUT WHAT IT IS AFTER IS LAW OF THE LAND.Just let them be left alone until the world is destroyed by our culture. Just consider the latest data from CERN, WMAP, ICECUBE, AND FERMILAB ...I will continue regardless of being dissed by ANY dreamer in Mathematical Physics Meet me in the 5th to 11fh dimensions to continue discussions OR I can send you a copy of my UNPUBLISHED Theory of Nothing.
+tutiqt22 You sound like you are a member of the THOUGHT POLICE. Trying to attack people with passive agressive ad hominem attacks so they stop questioning authorities. I hope you don't practice this on children, that are easily intimidated and don't remain in their selfhood like DON HILL sr does! Because if you do, we will have more kids running around that behave like obedient sheeps instead of curious children that ask questions and make this world a better place.
These scientists can't even predict the weather here on earth with any certainty, yet they think they understand the expansion of the universe. Amusing.
Marge: Homer, theres a person here with me that can help you. Homer: Batman? Marge: No. Hes a scientist. Homer: Batman is a scientist? Marge: Its not Batman!
could dark energy be something like light that is so old that it is outside the cosmic background lens? light may do work inside the universe, on the universe, loosing energy to matter, begs asking, does dark energy, dark matter exist outside the background radiation or map of the universe as we know it? Does our ability to see and map the edges, depend on our location? centric dependent, or does outliers of galaxies far at edges have a different view of the universe, at least from an expanding universal measurement, but also do these place have a view of total blackness in most directions, except , back in the direction of most of the visible universe? Or are they multiverses with new measurements we cannot imagine?
that is a long way to go for a justification of redshift. Also, i call foul on invoking the cosmological constant to (again) cover for experimental observation not jiving with theory.Einstein alone did it twice, and it seems to get trotted out in all circumstances where the math ends up off. Maybe look at Chip Arn, and finally get his redshift findings out of the doghouse. Electric/Plasma Universe seems more consistent by the day. Is Plasma the new Quintessence?
Gravity exists only in mathematics , The math of the cosmos completely breaks down at the quantum level because E = mc2 only works when 96% of everything is unknown . The fabric of space/time (relativity: explanation for gravity) has been expanding for billions of years yet gravity has not changed . Photons are mass less particle/waves right . how is energy transported in a massless state ? Ask any scientist what the distance is that water starts to curve on a ball , there is no answer . 9.8 m/s2 , the acceleration of gravity is calculated as a constant . . . . . the fabric of space/time according to Einstein is the basis for relativity which has been expanding for billions of years . How can G be a constant ?
Nazman I kept thinking that if Robin Williams had decided to be a scientist, this would be him! Mr Williams was also a brilliant man but went in a different direction.
Good Morning. I would like to know more about the stars Dwarfed brown, how they form and can have planets around them. and if so, how serious those life on this planet ??
astronomers measure light and nothing else... no planets, no exo- planets , no suns ,no black-holes, just light movement..... there is no proof of planets outside of our so called solar-system..... dont be so gullible , to fantastical claims
+Onkar Choudhary Light is photons, which are electromagnetic. Dark energy has no charge. ergo it's not another form of light energy. You've based that entirely on the name of the "thing" instead of it's properties.
BTW, dark energy is an illusion caused by the gravitational distortion caused by the gravitational fields of distant galaxies. Gravity from distant galaxies has a redshift effect on the frequency of light they emit in the same way that gravity can bend the path of light from a light source behind the gravitational field. The same spacial distortion bending light paths, also distorts the frequency of light emitted from super heavy distant galaxies. Hence no cosmic acceleration, no dark energy causing acceleration, no un-accounted for dark matter, and certainly, no big bang. This universe is eternal, without beginning or ending. Cosmic background microwaves are but distant galaxies who's light has been gravitationally distorted beyond your visible spectrum. Galaxies continually exchange and recycle energy and birth new stars out of old dead ones forever and ever. How do you think light escapes super heavy distant galaxies with its frequency visually unaffected by spacial distortions? Someday sapien's decendents will travel to distant galaxies and discover the return trip doesn't take require extra travel time as no acceleration is actually occuring... That is unless your craft is destroyed by a barbaric war mongering violent species, leaving you marooned on their backwards hillbilly planet where its custumary to torture food species before consuming them.
I would like to propose a dark matter candidate not mentioned in this presentation. The dark matter candidate is neutron groups. A neutron group is a group of two or more neutrons which are bonded together and can be described as an atomic nucleus without the protons and of course no orbital electrons. Such neutron groups would be stable just as neutrons in an atomic nucleus are stable. A single independent neutron will decay into a proton and an electron with a mean lifetime before decay of around 15 minutes. A neutron group does not decay just as a neutron in a nucleus does not normally decay.A neutron group would be invisible an unaffected by light. More about the formation of neutron groups here: www.academia.edu/5009126/The_evolution_of_the_universe Or search Google for: Richard Lewis The Evolution of the Universe This paper also has an explanation for the expansion characteristics of the universe.
Neutrons reacts to gravity Darkmatter does not react to gravity so Neutrons is not a candidate to Darkmatter Neutrinos is a better candidate to Darkmatter
The only way in which dark matter is detected is through its gravitational effect. It causes gravitational lensing of light from galaxies beyond the dark matter. It is also detected through its gravitational effect within galaxies which results in a rotation curve for stars within the galaxy which is inconsistent with the quantity of visible matter. So dark matter does react to gravity. It does not emit or absorb light which makes dark matter difficult to detect directly. Neutron groups do not emit or absorb light. This makes neutron groups a very good candidate for dark matter. Richard
Yes dark matter is detected through its gravitational effect but dark matter has a repulsive type of gravity that is opposite to normal gravity they call it dark energy it has a repulsive force Neutrinos is a better candidate to Darkmatter
I am not talking about neutron bombs or neutron stars but neutron groups. These are more like an atomic nucleus without protons or electrons. When light is emitted, it always comes from an orbital electron of an atom. The neutron group is so small that it would not interact in any way with light. It would be interesting to make some neutron groups in the laboratory and prove this result by experiment. Richard
he may have suggested Dark Matter, ahead of his time, but noone knows what it is, if it is matter. So, he was only ahead of his time in thinking what current scientist think. But you might all be wrong.
The ancient rshis of India realized dark energy/matter and the architecture of the Universe/multiiverses etc more than 3000 years ago... Refer the Subala-Upanishaḍ of the Śukla-Yajurveḍa states: ...Then he (Raikva) asked: "What was at first?" To which (He the Lord) replied: "There was neither Saṭ nor asaṭ nor Saṭ-asaṭ. From it, the ṭamas (darkness) was evolved. From ṭamas came bhūṭāḍi;....".... Read more at www.tititudorancea.com/z/subala_upanishad_of_sukla_yajurveda.htm .
I have watched several lectures regarding dark matter etc., and I have never felt I had a good understanding until this one. The lecturer reminds me of Feynman in that he is able to explain things in very clear terms without dumbing things down or talking down to us non-physicists, he remains very precise about what he says but finds a way to help me to grasp it. Superb lecture, I hope I can find more by Mr. Filippenko.
+Nondescript He has (for good reason) been selected to create a "great lecture series" on basic astronomy. It is worth your time and money.
If you want to see more by Mr. Filippenko, then watch the tv series, "The Universe", the only thing the history channel ever made of any actual value. He's basically the icon of that show, he's on it constantly.
My man, see a couple of his lectures in person. Legend!
A million miles over my head but couldn't stop watching. Bonus points for answering a question that's been bugging me forever, why in an expanding universe, the Andromeda Galaxy will collide with ours.
Alex Filippenko space lectures are pretty cool.He speaks well and keeps it interesting and understandable to laymen like myself..
Hi Alex,
questions
-------------
Does time flow with different rate among afar space and empty space close to a galaxy?
Do time-flow differences between empty space of relatively dense regions and afar voids, affect dark matter and dark energy?
Is dark matter and dark energy an effect of time on the Planck noise rate of particle generation
that fail to cancel each other?
If space dilates faster at some regions, then not only there is pitch lowering of fields, but
also informational elongation of transmitted data. Also all fields do NOT dilate with the same
rate, some fields like the Higgs field hate to dilate, so that friction among fields can generate
or consume spacetime. [inconsequent dilation among fields effect]
How does informational dilation of single fields [and also among different fields] affect the size of empty space?
How space chunks of different time flow interact among each other?
How now inside one space chunk fields that exist in that single one field
react among each other [the fields of a single space chunk] with their different
properties during dilation and space consumation? What affects has "among fields interaction"
to spacetime of that region we observe?
: )
have a nice day
Professor Filippenko is the best teacher I've ever had, utterly the best! It's good to see him sharing himself in talks like this so other people can get some of his awesomeness.
Best lecture I’ve seen on this or related topics. Mr Fillipenko is a national (or why not international) treasure!
Excellent lecture. Such an enthusiastic lecturer
Indeed! I wish I had teacher for physics with such characteristics in my school years.
I would skip school if I've had to listen to these unfunny jokes every other slide...
It is mork from mork and mindy
Don Mueller below gave me the perfect excuse not to say anything after watching this, except that I think Dr. F is a fascinating speaker. Nice Job Doc!
This is the first time I was able to get any new theories on dark energy, awesome lecture Alex, keep up the good work!
Superb & engaging presentation. Awesome poise of Dr.F answering very difficult Q&A. I'll have to see it again.
What a wonderful era to live in. I wish, somehow, I could be contributing to this pursuit. Wonderful lecture and lecturer.
Awesome lecture and very well presented.Truely one of the greatest minds in our time, Dr Alex Fillippenko.
2nd time watching this lecture, great professor! You should get him back to talk about multiverse, which he also offered in this video to come back and talk about.
Fantastic explanation of dark energy and the discovery of the acceleration of the expanding universe that won the Nobel prize.
I just feel a little smarter watching this. Thanks.
Nice lecture. Dark energy expanding universe faster and faster, so "big rip" is the end of the universe. Some believing in "big bounce" which is constant/endless big bangs extracting/retracing of the universe. Considering new theories of parallel universes and unreal world of quantum mechanics raising many questions about reality we live in....getting even more interesting.
Surprising that for a scientist he cares about whether or not other people appreciate his work. I would imagine that scientists are only concerned with research, proofs and evidence and not people that either like or disklike their work.
I started watching Dr. Alex Filippenko's Google talk on "Dark Energy and the Runaway Universe" and at around the 10:00 mark he talks about the possible deaths of our universe. I've researched the Big Crunch theory before and was sort of confused when Dr. Filippenko showed the graph at the 10:15 mark.
The reason I'm confused is because I am relying on the assumption that time is a just a representation of the expansion of space (spacetime), meaning if the expansion is outward then time will be moving forward and if expansion stops then time will stop. My question and/or critique is why time continues to move forward in his Big Crunch (red line/arrow) graph plot? Shouldn't the Big Crunch plot look like a unit circle from pi to pi/2 until it reaches the stopping point and then reverse from pi/2 back to pi and then repeat that cycle endlessly?
Similarly at 10:35 he explains how if you could observe the Big Crunch you would see galaxies assemble and expand, then reach a stopping point, then reverse and dissemble. If I'm right about time reversing during the Big Crunch, wouldn't you not be able to witness the Big Crunch because consciousness (time-dependent neuron interactions) wouldn't be accessible, or in other words we wouldn't be able to process/reflect on what we're seeing?
I love the QnA on these talks @ Google.
What a great lecture! I'm glad he put in the effort of making jokes. Some made me smile :)
What a great teacher on top of a being a superb scientist. Thank you Google for this!
Best explanation ever on contradictions about univers expansion
What contradiction is that? If you have an explanation, then you don't have a contradiction to begin with. ;-)
Time is created by the speed difference between slow resting mass energy (that includes you and me) and fast light speed energy.
As you you move faster toward the speed of light your time continues to slow until you reach light speed, at which your time stops and does not move forward or back. The speed of light aka universal constant is one anchor point in time with you being the other.
This is why everyone experiences time on a unique personal basis. You are the other anchor point. All matter is one anchor point in time and is why all matter ages.
The gap that is created between slow resting mass energy and faster light speed energy (xrays, light, gamma rays, radio waves, etc) is what we call 3D space.
At the speed of light both time and distance are zero. The earth has a diameter of zero! Both space and time rely on this matter to constant relationship.
One mechanism makes both, which is why time and space are dynamically connected.
It’s cool how one matter to light speed (universal constant) mechanism can make something that is 1D and something 3D.
Gravity appears to be the interference of the full matter to constant relationship. Basically matter gets partially in the way of other matter thus causing a decrease in the expansion of space directly between the matter causing them to move directly together.
For the full story (easy to read)
(timespacegravity.quora.com/)
That was fantastic and the questions at the end very intuitive.
58:50 "So we think the Universe began with a quantum fluctuation of nothing." I like to hear Prof Filinppenko speak of the unfathomable. It helps me keep my arrogance in check.
So many insights from this lecture. Alex brings it together with a good sense of humor. Good Q&A at Google. I was at Lick just 2 weeks ago
Wonderful lecture.
He was on the show "The Universe" the episode called Cosmic Apocalypse. Great stuff.
What a bummer about the short-ass Q+A ... and the questions were so much better than those asked of Dr.Frieman who does this same lecture more or less, at Fermilab in 2016.
Dr.Fillipenko is something else though, isn't he? Just as one would expect from a student of Dr.Sagan, may he RIP
Love his shirts. Filippenko is the archetype of the enthusiastic, slightly dorky, geek. His lecturing style is engaging and very effective. Check out - if you get a chance - his course on Astronomy on The Teaching Company's Great Courses.
+Alasdair Church I'm going to second that. "Understanding the Universe" is the title
Thanks for the recommendation.
“Gravitational worlds, they are moving or changing the orbit with all their family members depending
on the nuclear of each other” According to rule of gravitation theory says that in the
super cluster of galaxies, cluster of galaxies and galaxy, there are the black
holes of other kinds of energy in the deep of gravitational world. They are
moving or changing the orbit with all of their family members depending on the
nuclear of each other. And in this rule; all the gravitation worlds of universe have
become the victims of rolling or moving into the oval orbits of critical
radius. The gravitational worlds of the nuclear circle of the gravitational
worlds are expandable with other in the orbits around nucleus, resulting
that the universe is expanding. So- The Universe is not expanding. Being the nuclear of
the circle of the gravitational force, the visible worlds are going in distance
from each other in the difference of movement on the critical radius.
Using the telescope, Astronomer Edwin P. Hubble first observed the distribution of
galaxies in space. Scientist discovered that the is expanding and lawfully, Nobel foundation
gave Nobel Prize to the scientist in 1929.
From the long time- People & Students have been receiving education- The Blunder discovery and in my
research- results- it’s now 100% completed.
The most important tale is that- The Universe not expanding faster than light yet our solar world orbiting expanding faster
than light because solar worlds are in gravitational egg of super massive black hole.
See at shahidurrahmansikder.wordpress.com/2010/01/18/edwin-p-hubble/
Absolutely one of the great minds in human history.
The width of the umbra does not usually exceed 106 kilometers, so you have to choose the right place to observe an eclipse. And seeing one of 80 or 90% is not comparable to seeing it 100%. You have to be on the path of totality.
If you build a fusion,you will have a star!
Physicist Alex Filippenko
Is there something that, automatically put subtitles on those kind of talks, super interesting, unfortunately my parents are only speaking/reading dutch, i want to show this kind of videos
does the "universal constant" for dark energy change over time, by expansion or contraction of the universe, locally or universally?
Does a constant satisfy the equations, or does it need modifying in some large or small way to fit the data, across the birth to now data sets available?
Great lecture at Google by Dr F.
Always appreciated the energy in Alex.
Good type.
Acceleration
That must be 75% of My Pie.
Could it be that in the present, where we are right now, we are pushing and moving away from the rest instead of some big bang that have put things into motion and still expanding and pushing us away? So, how sure are we in determining where this motion is initiated from?
watch Dr lawrence , plank sat . It should clear things up A little
+thegreatmonster The big bang wasn't like an explosion where things move away from each other IN space. Instead it's space itself expanding. The naming of "big bang" is very misleading.
Yep, it sure is.
Any way that the guy who introduced Filippenko could have managed to sound even slightly interested?
how did it all get here? where was everything before it was in the universe? does anyone know?
Shortest best introduction ever
Very nice. Saul should have been here too. (Saul PerlMutter)
I believe dark energy is a positive pressure exerted by the vacuum energy of space-time, and that what we are calling dark matter is merely the effects of dark energy on regular matter.
A positive pressure exerted by space-time's vacuum energy predicts;
-the accelerating universe
-the expanding universe
-we should measure there to be more mass than we can see matter being accountable for
-matter in the center of a galaxy / cluster should have added relativistic mass, increasing its gravitational attraction, as well as its escape velocity
-matter in the outer regions of a galaxy / cluster should be moving faster than we predict, sometimes faster than our predicted maximum orbital speed without flying out of orbit.
In 1922 Friedmann first showed the expanding or contracting solution. Lemaître showed expanding solution. DeSitter showed Frame Dragging in Mass Object solution. In 1917 Vesto Slipher was first to observe Red Shift of Distant Galaxy. Hubble Constant was already published by Lemaître in 1927 which Hubble published in 1929. Hubble Constant predicted Accelerating Universe but it was not caught on till late.
By 1929, however, the work of Hubble and others had shown that our universe is expanding. This is readily described by the expanding cosmological solutions found by Friedmann in 1922, which do not require a cosmological constant. Lemaître used these solutions to formulate the earliest version of the Big Bang models, in which our universe has evolved from an extremely hot and dense earlier state.[6] Einstein later declared the cosmological constant the biggest blunder of his life.[7
Alex Filippenko is an actual scientist? I thought he was just one of the people involved with making the only reputable show to ever come out of the history channel, "The Universe".
Great talk!
Epic lecture
12:06 But isn't, according to one scientist that I forgot the name of (so no "appeal to authority" fallacy is intented), the Andromeda galaxy going to merge with our galaxy in the future? If the claim that it will merge with our galaxy, what does it means to the runaway universe theory? Does it refutes that theory or is there a explanation in the theory for such a case, like for example it is a anomaly that has a reasonable cause?
I need to watch this again for some clarifications, and perhaps you might get your answer that way too. But if it helps, what I heard is that on a "local" level - local being our galaxy in other words - gravity pulls planet and stars together. Yet on the larger, more vastly universal level, gravity gives way to expansion. So both exist; the perspective you are viewing from matters. Our individual or chosen reference point always influences the view, interpretation, and outcome... whether in the cosmos or in our daily life.
A smart person may have something smart to say, but it is the wise person who knows when and when not to say it.
Don Mueller i HAVE NEVER BEEN CALL A WISE MAN but many havecalledmeasmartass
DON HILL Okay, Grandpa Smurf.
Don Mueller I like living in Smurfdumb. Old smurfs rule
Being smart and wise is not a paradox.
What if the jerk is a phase transition of an orbit or a cycle?
What if dark energy and matter are the effects of the turning of the Universe?
Love you, Alex!!!
*pause* I'm wondering of Dark Energy: can it only expand so far in its "life," such as a star before changing behavior at its death? Could it begin collapsing upon itself at some point or retracting such as a rubber band? Just a thought before I forgot it. Thanks!
Based on everything we know about the universe, it changes in the most abrupt ways. Is all Dark Energy the same age? Would it occur simultaneously and equally across the universe? Breathing in and out.
That would explain Eternity, wouldn't it?
I am concerned, that the description, of dark matter/energy is very similar to the properties of light (photons). they power gravity, matter and are energy, and have electro-magnetic properties.(proven by gravitational lensing of light) gravity has a limited distance after which solar wind (photonic pressure) would push matter including galaxies at an ever increasing rate. there are four locations that effect this push 1. in proximity to gravity 2. in the center of the universe where light from all directions push in all directions, 3. near the edge of the universe where the push is in all but one direction, and 4. outside the universe where all light is pushing out of the universe. thus the acceleration. (like the time it takes for a photon to escape from the center of the sun.) we can only see photons when they are coming to us but away we can not see. like escape velocity gravity's power has limits. but the universe has been being filled by photons since the big bang and the light from all the suns from all the galaxies. pushing against each other explains the expansion easily. energy is neither created nor destroyed. it joins with matter and is released from matter thus all photons from the beginning are still there traveling in space or locked in matter. space is static it is not expanding only the matter in it that is moving. a body in motion will stay in motion until reacted on by an outside force. (photonic pressure for thirteen billion years?) this will continue until all light is expended (escapes the universe's matter unless it finds something out there, but not likely or we would have evidence of the matter at the edge of the universe contacting something that slowed it down changing it's red shift,) then there will no longer be any acceleration. matter will continue at that rate. and lastly when matter is heated it changes from state to state ("atomic compressed" like a black hole, a solid, a liquid, a gas, and as plasma.) expanding until it cools
DARK ENERGY
Authors Note
When discussing the nature of the energy and matter that universally goes into the makeup of the Earth and the surrounding Cosmos, it is necessary to make a distinction between the fundamental particulates of energy which exist below the atomic threshold, and those particulates which exist at and above the atomic threshold.
In order to make this distinction; I use two terms, macrocosm and macro-cosmic energy which refer to the larger non-pervading particulates existing at and above the level of the atom, and the two terms microcosm and microcosmic energy which refer to particulates existing below the level of the atom.
Preliminary References
Outer space From Wikipedia, the free encyclopedia
For other uses, see Outer space (disambiguation).
The interface between the Earth's surface and outer space. The Kármán line at a height of 100 km (62 mi) is shown. The layers of the atmosphere are drawn to scale, whereas objects within them, such as the International Space Station, are not.Outer space, or just space, is the expanse that exists between celestial bodies, including Earth.
State of matter - Wikipediaen.wikipedia.org/wiki/State_of_matter In physics, a state of matter is one of the distinct forms in which matter can exist. Four states of matter are observable in everyday life: solid, liquid, gas, and plasma.
From Wikipedia, the free encyclopedia
The first observation of gravitational waves was made on 14 September 2015 and was announced by the LIGO and Virgo collaborations on 11 February 2016.[3][4][5]Previously gravitational waves had only been inferred indirectly, via their effect on the timing of pulsars in binary-star systems.
DARK INVISIBLE ENERGY
All four states of matter solid, liquid, gas, and plasma which go into the makeup of the cosmos, are comprised of elementary infinitesimally sized energy particulates at the fundamental microcosmic level of the cosmos; and larger atom particulates of at the physically apparent level of the macro-cosmos.
Therefore, regardless as to whether we are discussing the natures of waterborne, airborne or electromagnetic waves travelling through outer-space, all waves of themselves are made up of particulates of energy, that can only propagate through a medium of particulates.
As such, and given the recent observation of gravitational waves being produced by the collision of two black holes and propagating through outer-space, this event which was witnessed by multiple initial observers, and millions more via video recordings of this event taking place.
This serves as being empirical proof, that outer-space is indeed made up of an invisible medium of energy particulates, which facilitate the transit of gravitational and other electromagnetic waves through outer-space.
Further Proof
Law of Physics
For there to be an output of energy, there must be an input of energy.
As such, it follows, that all forms of motion extending from those of infinitesimal vibrations, up to and beyond the orbital motions of particles around the nucleus of an atom, and planets around a star, all require an input of energy to fuel their motion.
And the newly discovered gravitational waves, cannot be nor professed to be an exception to this ironclad and absolute rule of physics.
Therefore given the fact that gravitational waves do require a medium of energy to facilitate their forward transit of motion through outer space, and an immediate and constant input of energy to fuel their forward transit of motion through outer space.
So it becomes apparent, that it can only be, that it is the medium of energy that facilitates their forward motion of transit through space, which also serves as the input of energy to fuel and drive their directed forward motions through outer space, namely a non-detectable dark invisible form of energy.
Additional Rational
There are only two choices concerning the fundamental nature of outer-space.
The first choice is as with the old schools of physics, which were of the belief that outer-space is an energy less void of nothingness.
The second choice is as with the modern schools of physics, which are of the belief that ninety percent of the cosmos is comprised of dark invisible matter.
However, confusion has reigned regarding this, as some physicists also refer to dark invisible matter as to being dark invisible energy.
And additionally, the inappropriate use of the word mass and misinterpretations relating to the nature of mass has also served to add to the confusion (s).
Hypothesis and rhetorical question relating to the fundamental nature of outer-space.
If we were able to do the impossible, and use a remote control device to manifest (Note I am aware that it is impossible to manifest nothingness, as this is a contradiction in terms, however this is a hypothetical scenario, not a reality to be taken literally), a wave of particles or a body of matter within a totally energy-less void of nothingness, what would happen?
All particles whether they exist within a wavelength or a body of matter *radiate energy outwardly from their structures*, and it is this output of energy that serves to facilitate their motions and their interactions with other particles.
Therefore given the introduction of radiant energy particles into an energy-less void, they and their outputs of radiance would instantaneously blink out of existence as their energy dissipated into the void.
Vis-a-vis Hypothesis
If we were able to do the impossible, and use a remote control device to manifest an energy-less void of nothingness into the airless (devoid of atoms only) vacuum of a science laboratory bell jar.
What would happen as a result?
The radiant energy of the surrounding atoms of glass would instantaneously be drawn into the energy less void, and arguably the glass bell jar would either shatter, disintegrate or disappear into the nothingness that was within the bell jar.
As Such
Energy cannot exist within an energy-less void of nothingness.
Energy-less nothingness cannot exist within anything (energy and matter).
Conclusion: Dark Invisible Energy
The vast majority of the cosmos exists in the form of fluidic all-pervading microcosmic energy particles, which serve to fuel the elementary particles of the gravitational electromagnetic spectrum, and facilitate the formation and the transit of their wavelengths throughout the cosmos.
As Above So Below - All Things From Little Things Grow.
Cosmic microcosmic ocean of energy particles and matter
Planetary macro-cosmic oceans of water and fish.
Planetary macro-cosmic oceans of gases and birds.
Earth: Electromagnetic particles and atoms of solid matter.
Wind: Electromagnetic particles and atoms of fluidic gaseous matter.
Water: Electromagnetic particles and atoms of fluidic liquid matter.
Fire: Electromagnetic radiant heatwave particles of deconstructing atomic matter.
www.fromthecircletothesphere.net
made my day. wonderful.
How do I protect my scientific theory?
My Idea is that if you considered the dark energy to be equally divided and surrounding every Planck sized bit, generated by the so called big bang, and causing the bit to oscillate at it's resonant frequency. Since it was a single particle they would FILL the existing gravity field, the Universe, instantly vibrating at an unimaginable high frequency generating a potential power so high I refuse to state the number I calculate. The size of the universe increases as the particle vibrating area increases and begins decreasing as they acquire mass through fusion with each other. In a few million years a large number of Galaxies form and the process continues to expand the Universe until the gravity of the Galaxies takes over and the Universe returns to the single particle. Then the crushing force of the entire Universe causes the cubic kilometer (guesstimate) containing approximately 2.5 X 10^104 particles per cubic meter to implode and .....REPEAT....
This fits the string theory and the complex oscillations, that you like, are derived relying on Time as the ONLY added dimension. What happens next is?
(note) A cubic kilometer contains 15 X 10 ^ 1124864 particles, that may be too much for one universe
***** i have been around for over 80 years. I have seen the results of hundreds of predictions by super scientists the great Einstein is now being challenged by new findings. Many who challenged him in his time are being proven correct. Education does not lead to knowledge. Think for instance of ALL our educated politicians and what greatness they bring to our country. I have no faith in mathphysics physics result in negatives which can not exist in the physic..al world. We can only exist in the physical world. You sound like our brilliant representative to Congress from California. She said that the proposed law was 2700 pages and she didn't read it. JUST VOTE FOR IT. WE CAN FIND OUT WHAT IT IS AFTER IS LAW OF THE LAND.Just let them be left alone until the world is destroyed by our culture. Just consider the latest data from CERN, WMAP, ICECUBE, AND FERMILAB ...I will continue regardless of being dissed by ANY dreamer in Mathematical Physics Meet me in the 5th to 11fh dimensions to continue discussions OR I can send you a copy of my UNPUBLISHED Theory of Nothing.
A Planck length isn't the smallest unit of distance, that's a popsci myth.
+tutiqt22 You sound like you are a member of the THOUGHT POLICE. Trying to attack people with passive agressive ad hominem attacks so they stop questioning authorities. I hope you don't practice this on children, that are easily intimidated and don't remain in their selfhood like DON HILL sr does! Because if you do, we will have more kids running around that behave like obedient sheeps instead of curious children that ask questions and make this world a better place.
These scientists can't even predict the weather here on earth with any certainty, yet they think they understand the expansion of the universe. Amusing.
+jeffwads What a nonsensical comparison
jeffwads why is it nonsensical?
Simply brilliant!!!
Omg he looks like my physics professor. Nice talk.
Because he is your physics professor. Joke.
It's actually Columbo before he became a detective
Good info!!!
Marge: Homer, theres a person here with me that can help you.
Homer: Batman?
Marge: No. Hes a scientist.
Homer: Batman is a scientist?
Marge: Its not Batman!
Homer would have never said that. Read his Odyssey.
Are you saying Alex Fillipenko isn't Batman? Alfred isn't going to be happy to hear about this.
@@medexamtoolscom he's actually Columbo
could dark energy be something like light that is so old that it is outside the cosmic background lens?
light may do work inside the universe, on the universe, loosing energy to matter, begs asking, does dark energy, dark matter exist outside the background radiation or map of the universe as we know it?
Does our ability to see and map the edges, depend on our location? centric dependent, or does outliers of galaxies far at edges have a different view of the universe, at least from an expanding universal measurement, but also do these place have a view of total blackness in most directions, except , back in the direction of most of the visible universe?
Or are they multiverses with new measurements we cannot imagine?
Алексей! Ты КРУТОЙ!!!
thanks! excellent talk!
that is a long way to go for a justification of redshift. Also, i call foul on invoking the cosmological constant to (again) cover for experimental observation not jiving with theory.Einstein alone did it twice, and it seems to get trotted out in all circumstances where the math ends up off. Maybe look at Chip Arn, and finally get his redshift findings out of the doghouse. Electric/Plasma Universe seems more consistent by the day. Is Plasma the new Quintessence?
Gravity exists only in mathematics ,
The math of the cosmos completely breaks down at the quantum level because
E = mc2 only works when 96% of everything is unknown .
The fabric of space/time (relativity: explanation for gravity) has been expanding for billions of years yet gravity has not changed .
Photons are mass less particle/waves right . how is energy transported in a massless state ?
Ask any scientist what the distance is that water starts to curve on a ball , there is no answer .
9.8 m/s2 , the acceleration of gravity is calculated as a constant . . . . . the fabric of space/time according to Einstein is the basis for relativity which has been expanding for billions of years .
How can G be a constant ?
I like this guy.
My black cata Jenny says, "If you want to find dark energy or dark matter, you can't be no WIMP." :D
Excellent.
If you just want to hear " a Runaway Universe" tap here 59:39.
ooo what a find. I think he's a fantastic communicator and i like his jokes :)
Is the “ ever expanding universe” merely the original inflation following the Big Bang?
He reminds me of a Richard Feynman...
But he looks like Robin Williams
Columbo!!?
Well really nice to know we only know 5% of astronomy I guess we're pretty stupid still
Alex - vanity...vanity...all is vanity!
Brilliant!
Did they put dark matter in respect, because there is 5.46-times more dark matter than real matter in the concept called big bang universe?
It kept bugging me who he reminds me with, I think it is Robin Williams. Amazing lecture though! Wow!!!
Nazman I kept thinking that if Robin Williams had decided to be a scientist, this would be him! Mr Williams was also a brilliant man but went in a different direction.
Good Morning. I would like to know more about the stars Dwarfed brown, how they form and can have planets around them. and if so, how serious those life on this planet ??
astronomers measure light and nothing else... no planets, no exo- planets , no suns ,no black-holes, just light movement..... there is no proof of planets outside of our so called solar-system..... dont be so gullible , to fantastical claims
thank god for lex
Dark energy another form of light energy
+Onkar Choudhary Light is photons, which are electromagnetic. Dark energy has no charge. ergo it's not another form of light energy. You've based that entirely on the name of the "thing" instead of it's properties.
BTW, dark energy is an illusion caused by the gravitational distortion caused by the gravitational fields of distant galaxies.
Gravity from distant galaxies has a redshift effect on the frequency of light they emit in the same way that gravity can bend the path of light from a light source behind the gravitational field.
The same spacial distortion bending light paths, also distorts the frequency of light emitted from super heavy distant galaxies.
Hence no cosmic acceleration, no dark energy causing acceleration, no un-accounted for dark matter, and certainly, no big bang. This universe is eternal, without beginning or ending. Cosmic background microwaves are but distant galaxies who's light has been gravitationally distorted beyond your visible spectrum.
Galaxies continually exchange and recycle energy and birth new stars out of old dead ones forever and ever.
How do you think light escapes super heavy distant galaxies with its frequency visually unaffected by spacial distortions?
Someday sapien's decendents will travel to distant galaxies and discover the return trip doesn't take require extra travel time as no acceleration is actually occuring... That is unless your craft is destroyed by a barbaric war mongering violent species, leaving you marooned on their backwards hillbilly planet where its custumary to torture food species before consuming them.
imho, last question was a best!
Next video please
By golly, this actually makes sense ^^
I would like to propose a dark matter candidate not mentioned in this presentation. The dark matter candidate is neutron groups. A neutron group is a group of two or more neutrons which are bonded together and can be described as an atomic nucleus without the protons and of course no orbital electrons. Such neutron groups would be stable just as neutrons in an atomic nucleus are stable.
A single independent neutron will decay into a proton and an electron with a mean lifetime before decay of around 15 minutes. A neutron group does not decay just as a neutron in a nucleus does not normally decay.A neutron group would be invisible an unaffected by light.
More about the formation of neutron groups here: www.academia.edu/5009126/The_evolution_of_the_universe
Or search Google for:
Richard Lewis The Evolution of the Universe
This paper also has an explanation for the expansion characteristics of the universe.
Neutrons reacts to gravity Darkmatter does not react to gravity
so Neutrons is not a candidate to Darkmatter
Neutrinos is a better candidate to Darkmatter
The only way in which dark matter is detected is through its gravitational effect. It causes gravitational lensing of light from galaxies beyond the dark matter. It is also detected through its gravitational effect within galaxies which results in a rotation curve for stars within the galaxy which is inconsistent with the quantity of visible matter.
So dark matter does react to gravity. It does not emit or absorb light which makes dark matter difficult to detect directly. Neutron groups do not emit or absorb light. This makes neutron groups a very good candidate for dark matter.
Richard
Yes dark matter is detected through its gravitational effect
but dark matter has a repulsive type of gravity that is opposite
to normal gravity they call it dark energy it has a repulsive force
Neutrinos is a better candidate to Darkmatter
Neutrons can absorb and reflect a lot of light
haven´t you heard about Neutron bombs or Neutron stars
I am not talking about neutron bombs or neutron stars but neutron groups. These are more like an atomic nucleus without protons or electrons. When light is emitted, it always comes from an orbital electron of an atom. The neutron group is so small that it would not interact in any way with light. It would be interesting to make some neutron groups in the laboratory and prove this result by experiment.
Richard
implosion? like to see that
Feck me....I didn't know Columbo was such a great Physicist 🤯😅
Awesome guy
Next please..Robin Williams is alive?
I want some of that Dark Energy.
How the Genie fools himself about his own geniality?
By creating the most realistic illusion, and call it: Time.
30, 543 people know what to watch on youtube... 7 people don't enjoy it
+greg androsuik 17 Trump supporters thought this would be a lol-cat video
+rodluvan1976 One liberal pseudo-intellectual (you) thought your childish comment was funny.
greg androsuik Lol Even with not knowing what this man was saying it was still interesting A.F
he may have suggested Dark Matter, ahead of his time, but noone knows what it is, if it is matter. So, he was only ahead of his time in thinking what current scientist think. But you might all be wrong.
Couldn’t he have had a clicker to change his own slides?
I love this guy,
he reminds me of Anthony from Smosh, idk why lol
Columbo!?
A critical universe!?....I don't blame it,we are always calling it different stuff and judging it....
And he still looks like columbo
The ancient rshis of India realized dark energy/matter and the architecture of the Universe/multiiverses etc more than 3000 years ago... Refer the Subala-Upanishaḍ of the Śukla-Yajurveḍa states: ...Then he (Raikva) asked: "What was at first?" To which (He the Lord) replied: "There was neither Saṭ nor asaṭ nor Saṭ-asaṭ. From it, the ṭamas (darkness) was evolved. From ṭamas came bhūṭāḍi;....".... Read more at www.tititudorancea.com/z/subala_upanishad_of_sukla_yajurveda.htm .