I just love Dr. Kipping's poetic delivery, his ability to simplify complex astronomical topics, and the high production values of these videos. An automatic watch and thumbs up!
He really does an amazing job on every video of giving you the info without clouding it with his bias or opinion just the facts he has at hand or we have
He is a physicist that has many papers. He seems objective instead of some one who is pushing a narrative that is trying to manipulate the facts to fit a narrative.
Prof. Kipping you are a great inspiration to all...congratulations and I would like to emphasize that every time I watch one of your videos i literally you literally blew me back to my seat giving me the feeling that Carl Sagan never left us ... thank you for everything you do ..and as always greetings from Greece
The impossibly vast distances to even the closest stars to me suggests that we may never know the answers to these questions, sad but true. Absolutely great channel by the way.
With our current technology is true, but what the future holds is uncertain. We are close to discover fusion energy in a few centuries and new theories that can propelled our technology to achieve more it could be possible sadly maybe not in our lifetimes 😕
I don’t think so, we have achieved things that back then we thought were impossible for humanity to reach but we made it. It certainly won’t happen in our lifetime and it would take many years to achieve it but I’m pretty sure we’re going to make it. We are an intelligent civilization, you just need to look around you to see all the things we have created. I have faith in us and we’re going to keep on trying and trying until we make it a reality.
I love that you don't embellish what you're communicating in your videos. I am only speaking for myself, but objectivity in any field that deals with discovery is far more interesting than a lavish overtelling.
Seriously man, seeing people with vision, passion and diligence, like all the scientists tackling the most complex and essential for our survival issues, really inspires me and makes feel so much better when life goes to shit. Thank you for all your work and for these excellent in depth presentations, Prof. Kipping! Keep the awesomeness coming!
Your comment really struck me-so deeply true. Life can easily seem horrible, even hopeless, almost any day of the week. But if I visit a museum, or get a rush ticket to the evening symphony, or just watch some beautifully made documentary or science video, especially like something from Prof. Kipping, everything seems better, or at least put in complete perspective. His view of the universe is like art, or better.
Honestly the quality of these videos alone are reason enough to expect a lot more exposure. But also the topics you choose and the way you explain them is just amazing. Hopefully more people will be interested in these things in the future.
Sometimes it is weird being aware of life's mysteries. My cat, sitting on my lap, doesn't care about planets or life or anything. He has continually and habitually ignored great videos like this one! Lol ;]
There is a myth that aliens created the egyptian pyramids, but in fact, it was a group of ancient cats. They mapped out the cosmos and invented reincarnation, and are now checking our progress right from our laps.
I’m personally glad that there’s a difference in measurement between what is considered a habitable zone. As an analyst, building a consensus is always good but a challenge of world view and of measurement is always better. And I like how you extrapolate their assumptions, comparing with known facts. Completely challenging conceptions of math and calculation and not letting it get stale is the primer of innovation. I love your teams videos, they are wonderful and full of promise.
Really helpful and informative video. I love how you are critical of the data as well a scientist should be. My criteria for Earth-like planets are the following : Just enough distance from the sun for liquid surface water A Magnetic field for shielding us from Cosmic rays A nearby body like the moon to stabilise the axis of rotation Enough Carbon-Oxygen-Phosphorous-Nitrogen in the planet crust for building potentially self-replicating molecules Enough of an atmosphere to shield us from meteor impacts, this implies a specific mass of the planet to hold the air above it.
@Ashwin kelkar the star of such planets must be at the approximately same distance from the center of their galaxies as our sun is Their star system must also have jupiter like planet (gas giant) that can save the earth like planets from meteoroid collision
@@stuartfox8499 sorry, we are not. In potentia even code that replicates and where complexity emerges is a self replicating system. Be it tell molecules or silicon encoded data. We are the only example that 'we' know of. Not unique by any chance.
@@imentor6556 the first criterion you mention is trivially met by all planets discovered, as their distance from us is insignificant compared to the radius of the galaxy.
Stuart Fox You believe we’re unique because you want to believe we’re unique. Every scientific discovery has proved the opposite since we discovered earths true place. Look at the Hubble Deep Field image. Billions of galaxies with more planets than stars. It’s incomprehensible to believe an earth-like planet happened just once. As I said, you simply want to believe we’re special because that’s what makes you comfortable.
Prof. Kipping, thank you and your team for what you're doing! It's a huge inspiration and it's very rare, when we can enjoy such a high quality content on RUclips on this important topic! I wonder if you'd like to add the possibilty to contribute in spreading your amazing work by at least adding subtitles for other languages. Then our community could share this information with more people all over the world, who understand English not so well, and show the videos to our friends and families. That's very important! Thank you!
Ah yes, at last a channel that at least begin to break down the possibilities of habitable planets in a realistic manner..Great presentation in a relaxing, yet accurate format. Subbed.
I'm genuinely surprised by this! Even though I consider myself to be pretty well-informed about space, I don't think I've ever come across mention that this was a controversial topic, despite these wildly varying studies that should've made that a given. I guess it goes to show that so many people are desperate to believe Earth-like planets are common that it just sort of...got ignored.
the music really just helps to give the emotional push in the video which in turn helps you get more into the video, i love your work, keep up the amazing content man
I learn something new every time I watch one of your videos. I'm a relatively new subscriber, but this has quickly become one of my favorite channels to watch. Thank you Cool Worlds 😊
You are definitely the new Carl Sagan. Your ability to break down the knowledge is amazing. As far as the question “What is an Earth like planet?” I’d say it has to have 95% of the Earths property’s. Has to have a magnetic field, water, moon, ice, mountains, tectonic plates. The habitable zone is easy because it’s where water is. Too hot, water boils away and too cold, it freezes. It would also have to have a near perfect orbit and some rotation that’s neither too fast or too slow.
What impresses me most about this channel is how fair David is with the work of colleagues. It also provides the context in which the scientists move in their work. In this case, how the different conclusions come about that were drawn from the available data and what technical limits their collection is subject to. That is the great didactic achievement of this channel.
When I finish watching one of your videos, and this one is certainly no exception, I feel like they should all be mandatory education and entertainment criteria. Fascinating and/or educational for everybody. Love it, love it, love it.
I'm honestly amazed by your channel. You are not only an accomplished scientist, but are also a teacher. Sure, you might get a paycheck from some big name institution, but you have extended your love of education onto all of us. You show us the wonder and beauty of the world. When the chips are down, I think you will be remembered as a Carl Sagan type. At least you will be for me.
No exomoons have been discovered as of now. Ofc the possibility of moons makes large gas giants in the habitable zone interesting too, but we should wait until we have the technology to detect them before we make An assessment.
@@bobcloughjr Yes, a candidate because it cannot yet be ruled out. However, energy gradients are so low that the probability of Abiogenesis must be infinitesimally small. I am very much for robot missions to Venus to search for signs of previous life. As the probability of Abiogenesis on Venus should have been high in the early era of the solar system. Higher even than on Earth, if I should guess. IMHO moons are only good candidates if their rotation isn't locked in. Unfortunately, there aren't many, if any, in the Solar system. A few orbit fast enough though.
This channel needs way way way way way more subscribers! The video about accelerating at 1G and describing what that would be like was borderline transcending in the way it was done, if somebody knows that video name put it up for everybody to watch! This is such a great on so many different levels the most channels don't achieve
@@CoolWorldsLab Yes! Everyone subscribed to this channel needs to watch that video!! It was actually the first video I watched from your channel :) I shared that video with a bunch of family and friends, even ones that don't follow science and astronomy and quite a few of them said they didn't fully understand it but they we're still able to get a mental image that made them feel excited and intrigued, they start asking me questions about astronomy, subscribe to your channel so all the wonderful things I'm sure we both want in the world is renewed, new or increased interest in science and astronomy. My dad watched it, subscribed and said he watch your channel for like a week straight each night after work so he had renewed interest again. So I just wanted to share that with you without dragging this out any longer haha :-) thanks so much again for putting your heart and soul into your work and your channel for all of us 2 by default be a part of in our own way! 😊😊
I love learning from this guy! He's so much better than Neil deGrasse , bill Nye the Science Guy , Michio Kaku or any of them really. Oh and he's pretty handsome too!
Bill Nye is not really a scientist or astrophysicist. He just played one. He actually has an undergraduate degree in an unrelated discipline. Lately he seems to ignore science in favor of political themes.
Great video as usual, thanks! To me it illustrates two things: there is no point in trying to quantify a parameter before you have explicitly defined what it is, and that we don't yet have the data to constrain this parameter within a couple of orders of magnitude, but we will have it in the not-too-distant future. A third thing is that the media gets things wrong, but everybody should know that already.
Great video. I subscribe to the extremely rare version of habitable earth-like planets. But that simply means there are tens of thousands instead of billions in our galaxy alone. This channel and cfa are the best. Keep posting.
I think the number of planets in the Milky Way exactly like earth is probably not as big as people would like to believe, but with the huge number of stars in our galaxy, let alone the universe, there is room for a lot of diversity - and life comes in many forms - think of how many different states the earth has gone through in it's lifespan and how life has evolved with it in spite of several mass extinctions. So I think there are many worlds that are habitable to SOME kind of life, even types we have never observed..
Great informative video. I was thinking of clicking out when I saw how long it was, but I stayed after watching for a bit, and realized that you were talking about a lot of factors that go into finding Earth-like planets that never really cross my mind! Another interesting thing to think about would be Earth-like moons, orbiting things like gas giants in the habitable zone -- or maybe even other moons like Europa, which are much smaller than earth, but could be habitable to life. Detecting them would be near impossible though.
Prof David Kipping...First, I'd like to say I love your presentations. Your videos are informative, unbiased and professional. Lacking a condescending tone or sense of superiority I see all too often from other presenters, I feel you show more respect towards your viewers than anyone since Carl Sagan and I greatly appreciate it. That being said...I'd like to know, if possible, where can I find a copy of the picture on the wall behind you?
I don’t remember the piece name but I bought it some years ago from art.com, it’s not supposed to be anything spacey but I see the galactic disk. Thanks for those kind comments!
I would say to be considered habitable a planet needs to be: In a zone that supports liquid water, Have a good magnetic field, Not tidally locked; experiences globally day/night to the extent that temperatures are generally averaged similar to ours.
* habitable for what? A tidally locked planet, with water, oxygen, atmosphere and strong magnetic field could very well harbor life. It may not be sufficient for “intelligent life” without a “day/night” axial rotation, but we won’t know until technology advances quite a bit further.
The title of the video is “earth like”. These would be places we could travel to and possibly survive. So I would add that they need to be close to the size of earth. Of course we know from our solar system that Venus is near the habitable zone and nearly the same size as earth - so I would lean towards being more conservative and throw out the more lenient studies. The bottom line is we need a better I “telescope”.
Almost certainly not. But the overwhelming numbers work both ways. Odds are pretty bad against another planet having all the things earth has; mag field, plate tectonics, lunar tides from a relatively big moon, life and so on. And right now we just don't know how rare any those things are.
Randomly came across this video and this channel and i gotta say this is the greatest random encounter in my life. I love the way you explain things and your voice is so soothing that I can’t get it out of my head since. I’ll stay, not because of the knowledge that you’re trying to convey because this kind of science is out of my field, but because of the way you say and the voice. Thank you for making these contents and I hope your channel will continue to expand furthur cause this is one of the most underrated channel i have ever seen.
I've noticed that recently there are a few professors, scientists and experts of all ages and in many differing fields (many in cosmology, astrophysics and astronomy), airing their concerns about problems with the accepted data and what is publicly published as fact. All of these people, like Prof Kipping, are well respected and know what they are talking about. They are explaining their concerns using well thought out methods and don't hold back on the verbal beating they hand down to their associates. This is refreashing to see.
At last, a video that makes a stand against the clickbait with the actual facts! To "answer" your question, an Earth-like planet is one that Earthlings have been successfully terraformed :)
This guys voice is pure tranquility. It is like a drug, to listen to one of his videos at night when I lay down. It puts me to sleep. Not because it’s boring, but because it’s soothing. The videos are awesome and I do watch them in their entirety. Just love this guy. Wish he put more videos out
Tilted axis Large moon Plate tectonics Water(!) Right amount of active volcanos and greenhouse gasses Liquid iron core Large gasgiants in the system (meteor and comet removal) Stable stars in the neighbourhood + a few thousand other factors Probarbly boils it down to .000001%
I don't know. It may turn out that our planet is pretty mundane. We'll see. It might have more to do with the duration of time that all these factors can coexist
Water as a substance is not rare, the conditions for a stable supply of liquid water on the surface are. Maybe there could be different ways to achieve a stable solar system with few bodies guarded from comets etc. A lot of what you said could be achieved on big moons, not necessarily planets
@@maddman4747 You man, we're going to come to your house and sell it for space exploration fund. Go exercise or punch a heavy bag to vent off this energy. You will feel a lot better, trust me.
We haven't found any solar-system-like solar systems yet. Truly, the Rare Earth Hypothesis means there's probably Earth-like worlds out there, but are eternities away from Earth, and therefore inaccessible to us.
I think magnetosphere and a large moon are a must. I wonder if terrascope as you have proposed it would enable us to detect such features (the moon at least)
You are right, and the two of them go together. That large moon is directly responsible for the bulk of the gravitational friction necessary for the production of our magnetic field.
I recently tackled a similar question on Quora, so I would add a couple other criteria in addition to those you have discussed: 1) Consider only Population I stars which have high metallicity and therefore have the elements necessary for life. 2) Consider only middle-aged or older stars that have been shining long enough for life to have evolved. Say, 5 billion years, or more. 3) Item 2) suggests G, K or M spectral type stars. Type M stars, the red dwarfs, may not be suitable because of their instability.
definitely need to listen to this again, and again and again. Your last vid on life beyond earth was a very thoughtful and exacting. I found this to be the same. I shared the last with my friends who possess intellectual proclivities. I will do the same with the current. Keep the vid's coming
NOW YOU DID IT! I just wanted the snub around to see what's new in our knowledge in your special field and you fascinated me with your excellent analogies and explanations. The next weeks will go by seeing me watching ALL your videos. Well done BTW> Greetings from Florida, near the sun.
There is so much junk in the headlines that most of the media feeds us. Thanks for bringing us real science and making it more interesting than their single sentence punchlines. Keep up the great work, I am looking forward to what ever you decide to bring us next.
Prof Kipping i like your work so much that i felt a lil ashamed that I didn't know your name until recently!.lol..In any case when it comes to astronomy &/or the cosmos I get great appreciation and gratitude in the fact that you don't always say what I want to hear but the facts as you know it & what I need to hear!.. For example when you were comparing newspaper articles against true science articles concerning the amount of earth-like planets. Keep up the great work & if i don't always understand one of your videos I simply just watch it again! lol!
Previously watched your brilliant videos i just agree with your statement : "we don't know. But there is much to observe and discover. Keep it going. I just enjoy listening to and watching your videos. ❤️❤️❤️
I guess it rather depends on your definition: -a rocky body orbiting a star within what you consider to be the habitable zone? Too many to count would be my guess. -a planet sufficiently like ours to be capable of supporting complex life? Maybe a few. -a planet that actually hosts any kind of life at all? Clueless. -a planet hosting a technological civilisation? One, we're living on it. Of course we don't have enough data so it's all guesswork based on statistical models and personal biases.
Your videos are improving. You're part Isaac, part Fraser, part V101. It's a good formula. To answer your question for my part: While it's necessary to define parameters for individual studies, I don't think science is served by becoming attached to one particular definition of habitability until we gather more data. This discovery phase needs objectivity and open minds so potentially important pieces of the puzzle aren't ignored or dismissed.
Earth is unique. Why is it so difficult to accept this fact. Not everything can be explained by mathematics. Instead of encouraging us humans to believe that we are special and motivating us to become even better, mainstream media is trying to bring us down by making us feel insignificant. Just thinking of all the things humanity has achieved is mind blowing. I'm not only referring to science and medicine, but everything else what makes us who we are such as love, hate, humor, joy and sadness etc. Even if there is something out there it can't be something we are looking for.
this value would not mean much to me even if it were completely accurate since it does not include things like habitable moons, which might be even more common than habitable planets (or not). so even if accurate the number of habitable planets would only represent minimum value for habitable "worlds".
My favourite thing in this video, that people don't think too much but I'd say is of greatest relevance, is your effort to mostly deconstruct weak assumptions. It's easy and it can feel great to declare things true, to be the voice that claimed it first. But in some instances it's extremely important (and can be hard) to admit ignorance, to admit that data, definitions and studies aren't good enough to make a strong affirmation about something. I feel like in areas like this, in most cases it's best to admit there's too much we don't know, that more studies is needed, and many variables must be asserted to make a significant claim. So I'm grateful for your work done the way you do it, since in this video much of what you did was dismantle assumptions people and especially media may have, exposing the considerable weakness present in this area's studies. Thanks again Professor Kipping.
Who's being sleeping in my bedX8? I had a cosmic car once, it was out of this world. On a serious note it really was a cool car! Many thanks for the scalpel like clarity I expect from cool worlds, cool by name cool by nature, big love to your team.
Just found this video, and the last thing you said about the criteria for a planet with advanced life is the most important. Is it possible to identify the 15 or 20 essential criteria needed then start using our observations to assign numerical odds to each one? Right place in galaxy, right type of star, rocky planet, Goldylocks zone, liquid water, large moon, magnetosphere, plate tectonics, gas giant in outside orbit . . . If the odds of all these things happening in one place outnumber the planets in the observable universe, then we can forget about aliens and get work solving our own problems.
@@politicallycorrectredskin796 absolutely not..but in the center of the galaxy is to chaotic for life and int external of a galaxy there r not too many complex element
@@@martincastellano89 Yes that is what we assume. I just doesn't seem to me to be a verifiable rule at all. A planet in the outer rim might have heavy elements in it and sectors in the core might be stable and quiet enough long term for life. Also, life might be different in different places. For example, subterranean life might flourish in high radiation environments in the center of the galaxy. Or aquatic life. I just think we're sometimes projecting ourselves too much onto this issue. Keep an open mind and all that.
For someone who does not understand equations, you have a remarkable talent for making them understandable. I also love the way you don't hype it up, because that's what people would prefer to hear. Over the years, I've come to believe we are most likely alone in this universe. I kinda hope I'm wrong. It depends by what!
Wow, excellent video and astronomical analysis. Astronomy is not my field of expertise but I’ve always been enamored of the magnitudes of the measured data. Keep up the great content ! Thanks again.
intentional or accidental? Some of them videos have clever click bait titles or don't let you know it's about that particular genre untill some time in. That really pisses me off when it happens to me cause i can never recover that time in my life.
Nice video! I remember when the first few exoplanets were discovered back in the 1990's, before that we didn't even know if there are other stars with planets at all and if there are, how common they might be. So even though we have little information about earth-like exoplanets, at least we now know that planets around other stars are actually common.
I come from the pbs spacetime crowd. I like this show better, it has a relaxing, calming tone and it makes concepts very clear for the not-scientific/academic folk that enjoy keeping up with astronomy.
Kudos! Dr. Kipping, this is a sterling example of why we love your work. Crystal clear and calm, devoid of the "I want to believe" malarky that sometimes infects the search for exoplanets and extraterrestrial life. The science media wants clear answers and it will be a long time, if ever, that astronomy can furnish such clear answers. To paraphrase Richard Feynmann, I can live with doubt, rather than have answers which might be wrong.
I love this channel and you're whole approach to science and putting it out there. We need more of this spirit of enquiry across the whole of society. Thank You Professor and the cool worlds team
It's so nice to see an astronomy video that patiently walks you through the reasons why the best answer is "we need more data".
Thanks Ellen! We’re trying to get the pacing right so ideas can be really understood rather than just stated, thanks for watching!
I just love Dr. Kipping's poetic delivery, his ability to simplify complex astronomical topics, and the high production values of these videos. An automatic watch and thumbs up!
Yeah. What he said.
Well produced and I liked the fact the speaker did not draw conclusions and leaves me to my thoughts
Well the dwelling conditions have to be stabilize etaearths gravity may be lower or higher or exactly the same as earth will it be comfortable though?
He really does an amazing job on every video of giving you the info without clouding it with his bias or opinion just the facts he has at hand or we have
He is a physicist that has many papers. He seems objective instead of some one who is pushing a narrative that is trying to manipulate the facts to fit a narrative.
He doesnt bs and doesnt like the term maybe, he prefers i don't know. Which is far more accurate in his field.
Science is fact finding not conclusions.
Prof. Kipping you are a great inspiration to all...congratulations and I would like to emphasize that every time I watch one of your videos
i literally you literally blew me back to my seat giving me the feeling that Carl Sagan never left us ... thank you for everything you do ..and as always greetings from Greece
Dimitris Papadimitriou wxcv
He truly is the closest narrator to the great Carl Sagan
The impossibly vast distances to even the closest stars to me suggests that we may never know the answers to these questions, sad but true. Absolutely great channel by the way.
With good telescopes we can at least see things. Webb should be interesting.
With our current technology is true, but what the future holds is uncertain. We are close to discover fusion energy in a few centuries and new theories that can propelled our technology to achieve more it could be possible sadly maybe not in our lifetimes 😕
I don’t think so, we have achieved things that back then we thought were impossible for humanity to reach but we made it. It certainly won’t happen in our lifetime and it would take many years to achieve it but I’m pretty sure we’re going to make it. We are an intelligent civilization, you just need to look around you to see all the things we have created. I have faith in us and we’re going to keep on trying and trying until we make it a reality.
That is, unless we can crack relativistic space travel or some exotic superluminal loophole like warp drives and wormholes.
This quickly became one of my favorite channels. An actual hidden gem in the informative black hole of RUclips. 🙏🏻
Just found this channel and I am completely in love with it. The enthusiasm brought to each subject is genuine and gets me excited to learn.
I love that you don't embellish what you're communicating in your videos. I am only speaking for myself, but objectivity in any field that deals with discovery is far more interesting than a lavish overtelling.
Seriously man, seeing people with vision, passion and diligence, like all the scientists tackling the most complex and essential for our survival issues, really inspires me and makes feel so much better when life goes to shit. Thank you for all your work and for these excellent in depth presentations, Prof. Kipping! Keep the awesomeness coming!
Your comment really struck me-so deeply true.
Life can easily seem horrible, even hopeless, almost any day of the week. But if I visit a museum, or get a rush ticket to the evening symphony, or just watch some beautifully made documentary or science video, especially like something from Prof. Kipping, everything seems better, or at least put in complete perspective. His view of the universe is like art, or better.
I am something of a science fans myself
i put these videos on when i’m trying to sleep or take a nap. thank you for teaching me in my dreams.
When poetry meets astronomy, like two black holes dancing together, we feel cuddled by the produced gravitational good vibes.
Honestly the quality of these videos alone are reason enough to expect a lot more exposure. But also the topics you choose and the way you explain them is just amazing. Hopefully more people will be interested in these things in the future.
Once in my life I would have loved to have had a professor so articulate and engaging
Thanks Chuck!
I second that
Sometimes it is weird being aware of life's mysteries.
My cat, sitting on my lap, doesn't care about planets or life or anything. He has continually and habitually ignored great videos like this one!
Lol ;]
Maybe he ignores them because he knows already, he's just bored because he can't tell you all about it
With all due respect, your cat is a moron.
My cats would kick your cats ass.
There is a myth that aliens created the egyptian pyramids, but in fact, it was a group of ancient cats. They mapped out the cosmos and invented reincarnation, and are now checking our progress right from our laps.
I'd say your cat just lives in the moment.
I’m personally glad that there’s a difference in measurement between what is considered a habitable zone. As an analyst, building a consensus is always good but a challenge of world view and of measurement is always better. And I like how you extrapolate their assumptions, comparing with known facts. Completely challenging conceptions of math and calculation and not letting it get stale is the primer of innovation. I love your teams videos, they are wonderful and full of promise.
Really helpful and informative video. I love how you are critical of the data as well a scientist should be. My criteria for Earth-like planets are the following :
Just enough distance from the sun for liquid surface water
A Magnetic field for shielding us from Cosmic rays
A nearby body like the moon to stabilise the axis of rotation
Enough Carbon-Oxygen-Phosphorous-Nitrogen in the planet crust for building potentially self-replicating molecules
Enough of an atmosphere to shield us from meteor impacts, this implies a specific mass of the planet to hold the air above it.
Add a few hundred more! There is no such thing as a "self replicating molicue". Sorry, we are unique.
@Ashwin kelkar the star of such planets must be at the approximately same distance from the center of their galaxies as our sun is
Their star system must also have jupiter like planet (gas giant) that can save the earth like planets from meteoroid collision
@@stuartfox8499 sorry, we are not. In potentia even code that replicates and where complexity emerges is a self replicating system. Be it tell molecules or silicon encoded data. We are the only example that 'we' know of. Not unique by any chance.
@@imentor6556 the first criterion you mention is trivially met by all planets discovered, as their distance from us is insignificant compared to the radius of the galaxy.
Stuart Fox You believe we’re unique because you want to believe we’re unique. Every scientific discovery has proved the opposite since we discovered earths true place. Look at the Hubble Deep Field image. Billions of galaxies with more planets than stars. It’s incomprehensible to believe an earth-like planet happened just once. As I said, you simply want to believe we’re special because that’s what makes you comfortable.
This guy.....he's so knowledgeable and very very good at presentation......I literally love his videos
Prof. Kipping, thank you and your team for what you're doing! It's a huge inspiration and it's very rare, when we can enjoy such a high quality content on RUclips on this important topic! I wonder if you'd like to add the possibilty to contribute in spreading your amazing work by at least adding subtitles for other languages. Then our community could share this information with more people all over the world, who understand English not so well, and show the videos to our friends and families. That's very important! Thank you!
Your voice is comforting ❤️
Thanks
Keeps saying life what is life something that breaths and grows or fish in water or plant.
Ah yes, at last a channel that at least begin to break down the possibilities of habitable planets in a realistic manner..Great presentation in a relaxing, yet accurate format. Subbed.
I'm genuinely surprised by this! Even though I consider myself to be pretty well-informed about space, I don't think I've ever come across mention that this was a controversial topic, despite these wildly varying studies that should've made that a given. I guess it goes to show that so many people are desperate to believe Earth-like planets are common that it just sort of...got ignored.
the music really just helps to give the emotional push in the video which in turn helps you get more into the video, i love your work, keep up the amazing content man
I learn something new every time I watch one of your videos. I'm a relatively new subscriber, but this has quickly become one of my favorite channels to watch. Thank you Cool Worlds 😊
Shelly Scott thanks for subbing Shelly!
this video is good when you want to fall a sleep its peaceful
You are definitely the new Carl Sagan. Your ability to break down the knowledge is amazing. As far as the question “What is an Earth like planet?” I’d say it has to have 95% of the Earths property’s. Has to have a magnetic field, water, moon, ice, mountains, tectonic plates. The habitable zone is easy because it’s where water is. Too hot, water boils away and too cold, it freezes. It would also have to have a near perfect orbit and some rotation that’s neither too fast or too slow.
Huge fan of Professor Kipping ...love from India
My goodness, your videos give me so much hope for the future than you could possibly imagine.
I really enjoy your videos, even though most of it is way above my pay grade. Keep them coming. Thanks.
What impresses me most about this channel is how fair David is with the work of colleagues.
It also provides the context in which the scientists move in their work.
In this case, how the different conclusions come about that were drawn from the available data and what technical limits their collection is subject to.
That is the great didactic achievement of this channel.
When I finish watching one of your videos, and this one is certainly no exception, I feel like they should all be mandatory education and entertainment criteria. Fascinating and/or educational for everybody. Love it, love it, love it.
I'm honestly amazed by your channel. You are not only an accomplished scientist, but are also a teacher. Sure, you might get a paycheck from some big name institution, but you have extended your love of education onto all of us. You show us the wonder and beauty of the world. When the chips are down, I think you will be remembered as a Carl Sagan type. At least you will be for me.
The moons should be included too. I dont believe its much harder for life to evolve on a moon than on a planet.
Europa is considered a candidate that could have life in our solar system.
No exomoons have been discovered as of now. Ofc the possibility of moons makes large gas giants in the habitable zone interesting too, but we should wait until we have the technology to detect them before we make An assessment.
@@bobcloughjr Yes, a candidate because it cannot yet be ruled out. However, energy gradients are so low that the probability of Abiogenesis must be infinitesimally small. I am very much for robot missions to Venus to search for signs of previous life. As the probability of Abiogenesis on Venus should have been high in the early era of the solar system. Higher even than on Earth, if I should guess. IMHO moons are only good candidates if their rotation isn't locked in. Unfortunately, there aren't many, if any, in the Solar system. A few orbit fast enough though.
This channel needs way way way way way more subscribers! The video about accelerating at 1G and describing what that would be like was borderline transcending in the way it was done, if somebody knows that video name put it up for everybody to watch! This is such a great on so many different levels the most channels don't achieve
Journey to the End of the Universe!
@@CoolWorldsLab Yes! Everyone subscribed to this channel needs to watch that video!! It was actually the first video I watched from your channel :)
I shared that video with a bunch of family and friends, even ones that don't follow science and astronomy and quite a few of them said they didn't fully understand it but they we're still able to get a mental image that made them feel excited and intrigued, they start asking me questions about astronomy, subscribe to your channel so all the wonderful things I'm sure we both want in the world is renewed, new or increased interest in science and astronomy. My dad watched it, subscribed and said he watch your channel for like a week straight each night after work so he had renewed interest again. So I just wanted to share that with you without dragging this out any longer haha :-) thanks so much again for putting your heart and soul into your work and your channel for all of us 2 by default be a part of in our own way! 😊😊
Wish I had a class teacher as awesome as you! Thank you for sharing your wisdom with the rest of us that are curious.
It never ceases to amaze me every single video I've seen in Cool Worlds. Great job! Amazing!
I love learning from this guy! He's so much better than Neil deGrasse , bill Nye the Science Guy , Michio Kaku or any of them really. Oh and he's pretty handsome too!
He is handsome, and I was also thinking the other day, he is actually Hot!
Sexy and denior
Bill Nye is not really a scientist or astrophysicist. He just played one. He actually has an undergraduate degree in an unrelated discipline. Lately he seems to ignore science in favor of political themes.
I must confess Neil deGrasse annoys the hell out of me, his arrogance is astounding for a scientist.
@@MrRainjunky why u hate him?
Great video as usual, thanks! To me it illustrates two things: there is no point in trying to quantify a parameter before you have explicitly defined what it is, and that we don't yet have the data to constrain this parameter within a couple of orders of magnitude, but we will have it in the not-too-distant future. A third thing is that the media gets things wrong, but everybody should know that already.
Got the notification and put the sawzall down and taking my break
Great video. I subscribe to the extremely rare version of habitable earth-like planets. But that simply means there are tens of thousands instead of billions in our galaxy alone. This channel and cfa are the best. Keep posting.
Cheers Jeffrey! You mean the CfA colloquia videos? Yes they’re great
Great video 👍👍👍👏 as always.
Hello From ANTARCTICA
Antarctica is my target audience, I’m aiming to become the number one science channel there!!
I think the number of planets in the Milky Way exactly like earth is probably not as big as people would like to believe, but with the huge number of stars in our galaxy, let alone the universe, there is room for a lot of diversity - and life comes in many forms - think of how many different states the earth has gone through in it's lifespan and how life has evolved with it in spite of several mass extinctions. So I think there are many worlds that are habitable to SOME kind of life, even types we have never observed..
Great informative video. I was thinking of clicking out when I saw how long it was, but I stayed after watching for a bit, and realized that you were talking about a lot of factors that go into finding Earth-like planets that never really cross my mind!
Another interesting thing to think about would be Earth-like moons, orbiting things like gas giants in the habitable zone -- or maybe even other moons like Europa, which are much smaller than earth, but could be habitable to life. Detecting them would be near impossible though.
Prof David Kipping...First, I'd like to say I love your presentations. Your videos are informative, unbiased and professional. Lacking a condescending tone or sense of superiority I see all too often from other presenters, I feel you show more respect towards your viewers than anyone since Carl Sagan and I greatly appreciate it. That being said...I'd like to know, if possible, where can I find a copy of the picture on the wall behind you?
I don’t remember the piece name but I bought it some years ago from art.com, it’s not supposed to be anything spacey but I see the galactic disk. Thanks for those kind comments!
@@CoolWorldsLab Thank you...I see the same thing. Keep the excellent videos coming.
I'm going with the answer 1. Life is what made our planet "Earthlike".
Exactly.
Lol... Is it not obvious that they are talking about potential?
I like it that you just present the facts with no bias and leave me to come to my own conclution. Very rare and I thank you for that.
I would say to be considered habitable a planet needs to be:
In a zone that supports liquid water,
Have a good magnetic field,
Not tidally locked; experiences globally day/night to the extent that temperatures are generally averaged similar to ours.
* habitable for what?
A tidally locked planet, with water, oxygen, atmosphere and strong magnetic field could very well harbor life.
It may not be sufficient for “intelligent life” without a “day/night” axial rotation, but we won’t know until technology advances quite a bit further.
The title of the video is “earth like”. These would be places we could travel to and possibly survive. So I would add that they need to be close to the size of earth. Of course we know from our solar system that Venus is near the habitable zone and nearly the same size as earth - so I would lean towards being more conservative and throw out the more lenient studies. The bottom line is we need a better I “telescope”.
I have a degree in physics yet I am still learning as a student of yours. Masterpiece of a production and Educational quality.
I can't possibly wait a whole month for the next video :(
I love this channel so much guys, thank you for everything you do ❤
there is no place like home.
until it’s gone
There are infinite places like home in parallel universes
I find it hard to believe that we are the only Earth-like planet in this galaxy let alone this universe.
Almost certainly not. But the overwhelming numbers work both ways. Odds are pretty bad against another planet having all the things earth has; mag field, plate tectonics, lunar tides from a relatively big moon, life and so on. And right now we just don't know how rare any those things are.
Kevin Davis there are many Earth like planets that have been found it’s just we haven’t found life on any
We definitely aren't...
Randomly came across this video and this channel and i gotta say this is the greatest random encounter in my life. I love the way you explain things and your voice is so soothing that I can’t get it out of my head since. I’ll stay, not because of the knowledge that you’re trying to convey because this kind of science is out of my field, but because of the way you say and the voice. Thank you for making these contents and I hope your channel will continue to expand furthur cause this is one of the most underrated channel i have ever seen.
Thank you David. Just love your storytelling ability combined with scientific elucidation.
Very comprehensive and easy to grasp, thank you Prof
Now this, made my day! :)
I've noticed that recently there are a few professors, scientists and experts of all ages and in many differing fields (many in cosmology, astrophysics and astronomy), airing their concerns about problems with the accepted data and what is publicly published as fact. All of these people, like Prof Kipping, are well respected and know what they are talking about. They are explaining their concerns using well thought out methods and don't hold back on the verbal beating they hand down to their associates. This is refreashing to see.
Great video! I hope we find a nearby Earth-like exoplanet soon.
yes
There's not much chance of finding many planets akin to Earth in our galaxy.
@@suthinscientist9801 where did you come up with this claim ?
Our galaxy has 200 billion plus stars. Do tell.
At last, a video that makes a stand against the clickbait with the actual facts!
To "answer" your question, an Earth-like planet is one that Earthlings have been successfully terraformed :)
When the James Webb takes flight in 2050 we may be able to get a more accurate data set.
Yeah the question is what will we get first, flying cars, fusion power or JWST :)
You mean when they begin testing in 2050?
I know. It was supposed to be launched already.
I will be 99 then !!! Can it be done sooner ?
@decent question is there a faster way to send Internet signals beyond the speed of light?
This guys voice is pure tranquility. It is like a drug, to listen to one of his videos at night when I lay down. It puts me to sleep. Not because it’s boring, but because it’s soothing. The videos are awesome and I do watch them in their entirety. Just love this guy. Wish he put more videos out
Tilted axis
Large moon
Plate tectonics
Water(!)
Right amount of active volcanos and greenhouse gasses
Liquid iron core
Large gasgiants in the system (meteor and comet removal)
Stable stars in the neighbourhood
+ a few thousand other factors
Probarbly boils it down to .000001%
I don't know. It may turn out that our planet is pretty mundane. We'll see. It might have more to do with the duration of time that all these factors can coexist
Water as a substance is not rare, the conditions for a stable supply of liquid water on the surface are. Maybe there could be different ways to achieve a stable solar system with few bodies guarded from comets etc. A lot of what you said could be achieved on big moons, not necessarily planets
I KNOW HUH.? THE ARROGANCE OF THESE PEOPLE
@@filipo7703 AND JUST WHO IS IT THAT YOU WANT TO PAY FOR THIS EXCITING ENDEAVOR..?
@@maddman4747 You man, we're going to come to your house and sell it for space exploration fund. Go exercise or punch a heavy bag to vent off this energy. You will feel a lot better, trust me.
We haven't found any solar-system-like solar systems yet.
Truly, the Rare Earth Hypothesis means there's probably Earth-like worlds out there, but are eternities away from Earth, and therefore inaccessible to us.
I think magnetosphere and a large moon are a must. I wonder if terrascope as you have proposed it would enable us to detect such features (the moon at least)
You are right, and the two of them go together. That large moon is directly responsible for the bulk of the gravitational friction necessary for the production of our magnetic field.
I recently tackled a similar question on Quora, so I would add a couple other criteria in addition to those you have discussed:
1) Consider only Population I stars which have high metallicity and therefore have the elements necessary for life.
2) Consider only middle-aged or older stars that have been shining long enough for life to have evolved. Say, 5 billion years, or more.
3) Item 2) suggests G, K or M spectral type stars. Type M stars, the red dwarfs, may not be suitable because of their instability.
definitely need to listen to this again, and again and again. Your last vid on life beyond earth was a very thoughtful and exacting. I found this to be the same. I shared the last with my friends who possess intellectual proclivities. I will do the same with the current. Keep the vid's coming
NOW YOU DID IT! I just wanted the snub around to see what's new in our knowledge in your special field and you fascinated me with your excellent analogies and explanations. The next weeks will go by seeing me watching ALL your videos. Well done BTW> Greetings from Florida, near the sun.
There is so much junk in the headlines that most of the media feeds us.
Thanks for bringing us real science and making it more interesting than their single sentence punchlines.
Keep up the great work, I am looking forward to what ever you decide to bring us next.
Prof Kipping i like your work so much that i felt a lil ashamed that I didn't know your name until recently!.lol..In any case when it comes to astronomy &/or the cosmos I get great appreciation and gratitude in the fact that you don't always say what I want to hear but the facts as you know it & what I need to hear!.. For example when you were comparing newspaper articles against true science articles concerning the amount of earth-like planets. Keep up the great work & if i don't always understand one of your videos I simply just watch it again! lol!
Loving this channel...👏👏👏
I love the longer videos. I watch once or twice for the content, and after that your soothing, calm voice helps me fall asleep. Thank you.
Previously watched your brilliant videos i just agree with your statement : "we don't know. But there is much to observe and discover. Keep it going. I just enjoy listening to and watching your videos. ❤️❤️❤️
this channel has become one of my favorites lately
I dig how English people say "I'm sat here..."
Cool
We should use that.👍👍👍
Ive seen you on tic toc recently im sure haha
I guess it rather depends on your definition:
-a rocky body orbiting a star within what you consider to be the habitable zone? Too many to count would be my guess.
-a planet sufficiently like ours to be capable of supporting complex life? Maybe a few.
-a planet that actually hosts any kind of life at all? Clueless.
-a planet hosting a technological civilisation? One, we're living on it.
Of course we don't have enough data so it's all guesswork based on statistical models and personal biases.
Chariots of the Gods? - Erich con Daniken... Give it a read...
"von". Gdamn ottokorekt...
Prof.. I think you are becoming my idol.. excellent video as always good sir!
Your videos are improving. You're part Isaac, part Fraser, part V101. It's a good formula.
To answer your question for my part: While it's necessary to define parameters for individual studies, I don't think science is served by becoming attached to one particular definition of habitability until we gather more data. This discovery phase needs objectivity and open minds so potentially important pieces of the puzzle aren't ignored or dismissed.
A self aware collections of atoms. ❤❤❤❤👌
Earth is unique. Why is it so difficult to accept this fact. Not everything can be explained by mathematics.
Instead of encouraging us humans to believe that we are special and motivating us to become even better, mainstream media is trying to bring us down by making us feel insignificant. Just thinking of all the things humanity has achieved is mind blowing. I'm not only referring to science and medicine, but everything else what makes us who we are such as love, hate, humor, joy and sadness etc. Even if there is something out there it can't be something we are looking for.
Oh wow this is super interesting.
Thanks for watching!
The spin of the planet should be taken into consideration. Prof. Kipping you are awesome!!!
this value would not mean much to me even if it were completely accurate since it does not include things like habitable moons, which might be even more common than habitable planets (or not).
so even if accurate the number of habitable planets would only represent minimum value for habitable "worlds".
My favourite thing in this video, that people don't think too much but I'd say is of greatest relevance, is your effort to mostly deconstruct weak assumptions.
It's easy and it can feel great to declare things true, to be the voice that claimed it first. But in some instances it's extremely important (and can be hard) to admit ignorance, to admit that data, definitions and studies aren't good enough to make a strong affirmation about something.
I feel like in areas like this, in most cases it's best to admit there's too much we don't know, that more studies is needed, and many variables must be asserted to make a significant claim. So I'm grateful for your work done the way you do it, since in this video much of what you did was dismantle assumptions people and especially media may have, exposing the considerable weakness present in this area's studies. Thanks again Professor Kipping.
Our thoughts too, thanks!
you are so great.... thank you so much. l have learnt a lot from you .... this is great .
Awesome, this was a difficult concept to try and explain in accessible language!
You rock, Prof. Kipping! Thanks for sharing
Thanks dude!
Who's being sleeping in my bedX8? I had a cosmic car once, it was out of this world. On a serious note it really was a cool car! Many thanks for the scalpel like clarity I expect from cool worlds, cool by name cool by nature, big love to your team.
Just found this video, and the last thing you said about the criteria for a planet with advanced life is the most important. Is it possible to identify the 15 or 20 essential criteria needed then start using our observations to assign numerical odds to each one? Right place in galaxy, right type of star, rocky planet, Goldylocks zone, liquid water, large moon, magnetosphere, plate tectonics, gas giant in outside orbit . . . If the odds of all these things happening in one place outnumber the planets in the observable universe, then we can forget about aliens and get work solving our own problems.
and even a galaxy has their own habitable zone ...
outer-arm (suburbs) > like where our sun sits in the milky way (*but don't go near the supermassive black hole ''sagitarius A*'' @ the center!
@@lucrativelyrics2004 why? i'd like the downtown view 😂
Possibly. We have absolutely no idea.
@@politicallycorrectredskin796 absolutely not..but in the center of the galaxy is to chaotic for life and int external of a galaxy there r not too many complex element
@@@martincastellano89 Yes that is what we assume. I just doesn't seem to me to be a verifiable rule at all. A planet in the outer rim might have heavy elements in it and sectors in the core might be stable and quiet enough long term for life.
Also, life might be different in different places. For example, subterranean life might flourish in high radiation environments in the center of the galaxy. Or aquatic life. I just think we're sometimes projecting ourselves too much onto this issue. Keep an open mind and all that.
Prof Kipping, I simply love your videos. Keep up the amazing and enlightening work!
Thanks so much Erik!
is that a tesla driving by gas stations? ^^
Yes, good one! driving by as it doesn't need fossil fuels
For someone who does not understand equations, you have a remarkable talent for making them understandable. I also love the way you don't hype it up, because that's what people would prefer to hear. Over the years, I've come to believe we are most likely alone in this universe. I kinda hope I'm wrong. It depends by what!
There are 42 Earth like planets. There you go.
Done.
@rancid sausage bring a towel
@Antee Matter stay away from Vegas kiddo statistics is not your strong suite. That being said, the gin and tonics are very plentiful there.
@Antee Matter probably better for you in the long run honestly
Wow, excellent video and astronomical analysis. Astronomy is not my field of expertise but I’ve always been enamored of the magnitudes of the measured data. Keep up the great content ! Thanks again.
Ugh I just came from a flat earth video.....I need some real science.
You’ve come to right place :-)
Guess people wanna feel smart by watching obvious nonsense.
Flat earth = flat IQ...
intentional or accidental? Some of them videos have clever click bait titles or don't let you know it's about that particular genre untill some time in. That really pisses me off when it happens to me cause i can never recover that time in my life.
Nice video! I remember when the first few exoplanets were discovered back in the 1990's, before that we didn't even know if there are other stars with planets at all and if there are, how common they might be. So even though we have little information about earth-like exoplanets, at least we now know that planets around other stars are actually common.
Where's JWST when you need it.
*"Stay thoughtful, stay curious, and stay COOL WORLDS."*
I tend not to believe anything written in the Washington Post.
I come from the pbs spacetime crowd. I like this show better, it has a relaxing, calming tone and it makes concepts very clear for the not-scientific/academic folk that enjoy keeping up with astronomy.
Welcome over here! PBS Spacetime is a fantastic channel
To the few awesome people who sees this, I wish you a great day and a good luck ahead! 😍
Peace and love from an artist RUclipsr 💢!💚👍
Kudos! Dr. Kipping, this is a sterling example of why we love your work. Crystal clear and calm, devoid of the "I want to believe" malarky that sometimes infects the search for exoplanets and extraterrestrial life. The science media wants clear answers and it will be a long time, if ever, that astronomy can furnish such clear answers. To paraphrase Richard Feynmann, I can live with doubt, rather than have answers which might be wrong.
Great video. You clearly put a lot of thought into your presentation which is appreciated.
I love this channel and you're whole approach to science and putting it out there. We need more of this spirit of enquiry across the whole of society. Thank You Professor and the cool worlds team