Was the Milky Way a Quasar?
HTML-код
- Опубликовано: 9 июн 2024
- PBS Member Stations rely on viewers like you. To support your local station, go to: to.pbs.org/DonateSPACE
↓ More info below ↓
Check out Antarctic Extremes on PBS Terra: / pbsterra
Sign Up on Patreon to get access to the Space Time Discord!
/ pbsspacetime
Sign up for the mailing list to get episode notifications and hear special announcements!
tinyurl.com/yx9cusk5
Check out the Space Time Merch Store
pbsspacetime.com/
The Milky Way galaxy is relatively calm by the destructive standards of the rest of the Universe, and compared to its own very violent past. But just recently we discovered that its violent past was much more recent than we thought - and could even happen again.
Hosted by Matt O'Dowd
Written by Emily Diebert & Matt O'Dowd
Graphics by Leonardo Scholzer, Yago Ballarini, & Pedro Osinski
Directed by: Andrew Kornhaber
Executive Producers: Eric Brown & Andrew Kornhaber
End Credits Music by J.R.S. Schattenberg: / @jrsschattenberg
#space #astrophysics #spacetime
Special Thanks to Our Patreon Supporters
Big Bang Supporters
Alexander Tamas
David Nicklas
Fabrice Eap
Juan Benet
Morgan Hough
Radu Negulescu
Quasar Supporters
Christina Oegren
Mark Heising
Vinnie Falco
Hypernova Supporters
chuck zegar
Danton Spivey
Donal Botkin
Edmund Fokschaner
Hank S
John Hofmann
John Pollock
John R. Slavik
Jordan Young
Joseph Salomone
Julian Tyacke
Mathew
Matthew O'Connor
Matthew Ryan
Syed Ansar
Timothy McCulloch
Gamma Ray Burst Supporters
william bryan
A G
Adrian Hatch
Adrien Molyneux
AlecZero
Andreas Nautsch
Arefa Ahmad
Bradley Jenkins
Brandon labonte
Brandon Lattin
Brian Blanchard
Craig Stonaha
Dan Warren
Daniel Lyons
David Bethala
David Hughes
DFaulk
Douglas Cantrell
Eric Kiebler
Frederic Simon
Geoffrey Short
Graydon Goss
Greg Smith
John Funai
John Robinson
Josh Thomas
Kevin Lee
Kevin Warne
Kyle Hofer
Malte Ubl
Mark Daniel Cohen
Michael Conroy
Mirik Gogri
Nick Virtue
Nick Wright
Nickolas Andrew Freeman
Patrick Sutton
Paul Rose
Protius Protius
Randall Sylvia
Robert Ilardi
Scott Gossett
Sean Warniaha
Shane Calimlim
Steve Bradshaw
Tatiana Vorovchenko
Tim Stephani
Tonyface
Tybie Fitzhugh
Yannick Weyns
Yurii Konovaliuk
![Eminem - Houdini [Official Music Video]](http://i.ytimg.com/vi/22tVWwmTie8/mqdefault.jpg)
"Which actually makes Earth a Taurus, which explains so much."
This is why I like this channel. Never too serious they can't enjoy the funny side of thing. Always so detailed your head gains some angular momentum.
Brilliant!
Oh, I thought it was a torus?
@@amymason156 I think (may be wrong) that because it's the bull, it's the same etymology as minotaur...
True
Taurus is an Earth sign.
"Whatever is happening here on earth, the universe remains awesome!"
I needed that...
It sounds better than, "Whatever is happening here on earth, the rest of the universe remains barren and lifeless."
Veri Xcvoin I bet tons of slime 😂
Yes, the cancer statistics agree 😂⚰️
@@verixcvoin1432 what are you even talking about, thats unrelated to the original comment...
@@verixcvoin1432 the universe is finite but expanding, but the scope of how large it is is incomprehensible... there is a 99.9% chance there is something else out there, that some other galaxy has the conditions to harbour life, but even so its completely unrelated to the original comment
It just occurred to me the role Matt (and others like him) serve. Imagine if (or remember when) Matt wasn't on RUclips and we had to be told about these things from.... journalists. Those brilliant people who accurately convey the latest developments in various fields. Like Carl Sagan and Neil Tyson, Matt is in a prestigious line of knowledgeable scientists with the skill of communication. He bridges the gap between working scientists and lay people like us. He's our "journalist" with his finger on the pulse of the latest goings on. And he KNOWS WHAT HE'S TALKING ABOUT. *I* may not always know what he's talking about, but I can have faith that HE does. Unlike when the news tries to tell us something. Thank you Matt!
Thats why I always think when someone says they really dislike Neil degrasse Tyson because he speaks too much etc, or not doing enough research, I think we are lucky we have these science communicators.
They are immensely important. Matt, Carl Sagan, Neil, they reach a huge amount of people, conveying the previous scientific research results to the people all over the world, making kids interested in science and probably kickstart many science careers.
It's amazing that science communicators these days can have a "rockstar status". People love them. And they have an important positive impact!
in a matter of speaking, Matt is playing the role of a journalist. Just a very well informed one, with a devoted team of people there to help him research and write out the script.
@@maan7715 Except Neil deGrasse Tyson talks more about bullshit than actual science.
@@viliml2763 and he is hilariously wrong on many occasions, desperately nitpicky in others. he is the communicator for the low IQ masses. comparisons are really easy to make when you watch him present together with other scientists.
Really, please don't use the term "journalist," especially in the context of real scientific news and info. Nowdays, "journalist" leaves a bad taste in the mouth for me. A journalist working in a news networks, magazine and such tend to be either slightly distorted/leave things out, to fully blatantly off-base, whether it be due to being motivated for selling papers/increase viewership to just uninformed idiocy due to stupidity or just wilful ignorance of the facts. People like these gives the title "journalst" a bad name.
OTOH, people like Neil, Matt, Carl and others are what I'd term the ideal journalist, in that they can (usually! *occasionally nudges Tyson*) convey difficult concepts in a way that can be comprehended by anyone with a least a modicum of intelligence and patience. They're those with great skills in Presentation, Communication and Explanation.
Final Note, even Carl Sagan wont be able to make the most willfull dummies see the light too. And I think he's probably the best as it gets. Miss the great Mr. "Billions upon Billions upon Billions" Cosmos. His death in 1996 was a great loss to the world.
"Whatever is happening here on Earth, the Universe remains awesome."
Thank you.
wrr
Heavy...
@@zes3813 yep
@@michelschildmeijer7457 The rest remains awesome
"...has been relatively calm, for as long as we've been observing it."
That made me chuckle, considering astronomical time-scales.
Yeah, like, literally anything could have happened by now. Perhaps literal evidence of alien life could be behind the shroud, or great remains...
Both blinks of an eye.
@H D who would bother trying to disprove something that can't be disproven? Better to just focus on things that can be proven or disproven.
@H D Aye, you got the concept of "the burden of proof" the wrong way around.
Extraordinary claims require extraordinary proof, beit from religion to conspiracy theories.
And besides: the only good Simulation Theory I know is the album by Muse ;-p
@@Lord_RFAS I agree, "and besides," that Muse album is interesting. Gives me "Bladerunner" vibes looking at the album cover and listening to it. With a touch of Tron and cyberpunk feel too. Cool!
Consider this: If Sagittarius A got active again 10,000 years ago, we'd still be 16,000 years away from realizing. Unless we develop superluminal means of observation or travel first, that is.
I kinda think FTL communications is more useful than transport at this point.
If we could communicate with operations on Mars in real time then we could build a small outpost city entirely by remote without landing a single human being there.
@mnomadvfx well, with FTL transport comes FTL postal service. XD
@@mnomadvfx dumb, communications are a subset of travel, you get travel you get them both
Also, "[getting] active" isn't such an instant process; we'd see the signs starting, probably enough in advance of any serious action that we'd know about it before it really starts in earnest
Okay, my ten minutes are up, time to get back to...
[PBS Space Time uploads]
OH COME ON.
i was about to get back to work but this just came up, and what sucks is that they're always more than 14 min long.
@Belagerungsmörser the Sheep and there's always that one guy.
let me fix that for you, his videos are always longer than 10min so that he can monetize them and make money off of them, so he makes them long on purpose.
I was going to go to sleep but then this drops.
Haha, I'm sitting on the toilet far too long I should be back to work.
@@guystokesable Boss makes a dollar while I make a dime. That's why I poop on company time. 😏
Me: I'm passionate about the space and science. I love how the language of math can elegantly describe the beauty of the Universe.
PBS Space Time: Saggitarius has a snack followed by a burp, to make bubbles.
PBS perfectly described me: I'm a Saggitarius. I've had a snack and then burped. And then I made bubbles (Don't ask for pictures).
@@Blubb5000 😂🤣😂🤣 pictures!😂😂😂😂😂😂😂
@@Blubb5000 Bubbles from both ends? *BURP* ... *POP* *POP* LOL
Thanks, needed that laugh. Been a tad depressed lately from being shut in so long. :]
Most humans apes cannot understand astrophysics, so ape talk helps the lesser human apes to understand difficult concepts.
@@ultrasonicradiation We're truly/great/ apes.
”Galactic Core”
*painful Mass Effect flashbacks*
*painful Star trek V flashbacks*
Don't forget No Man's Sky!
@🐦MrSoTiredOfTheNewRUclipss😅 whats ptsd
*ASSUMING DIRECT CONTROL*
Haha. Perfect comment. All sci fi is great.
Wishing you all the best with the wierdness lately
Whats an astrophysicists favorite candy?
Starbursts
I figured it would be Astropops
Thought it was milky way
Thought it was smarties
Mars Bars.
Nerds.
Thanks for the second video in a row that doesn’t hurt my brain to try to understand
I'm sure we can get a Penrose diagram somewhere to make some quick Lorentz transformations.
This channel and this dude especially explains things in such a basic way, that someone with zero experience in astronomy or any other branch of "space science" for that matter, will easily understand what is being described and explained. I love it.
Lmao Samee XD
Lol... wonder if mental-masochism is a thing?
I 2nd that...
Number 3: Why didn't they call it a "Hubble bubble?" Seems like they missed an opportunity.
Especially because it is a double bubble
Kenny Tritch - Double Hubble bubble trouble.
A Hubble bubble is what I'd call the part of the universe visible from Earth.
Hubba Bubba? Been done!
@@balcius doubel hubble bubbel troubel 2: bubbel boogaloo
"The Mandalorian famously pioneered the use of video walls as backdrops to replace rear projection and chromakey. Now that ILM's done all that hard"development work, the tech is spreading to other TV shows. Clearly, to allow you to properly appear standing in front of the floating spacetime effect and keep up with the competition, PBS is obligated to buy you a wall-sized video display for your apartment.
I have spoken.
10:55 - That one dish looking other way: Nope, not gonna look xD
Hahaha XD
Niiice, there's the rebellious one!
"And on our left..." "The OTHER left... oh"
It knows that the Earth is flat.
It's the lookout, making sure nobody sneaks up on them ;-)
It always amazes me how we can explore the center of a star or some of the most extreme places in the universe by using instruments while STAYING HOME :). So even in a pandemic we can still explore the universe.
Thanks for working hard to keep this going even when working at home! Greatly appreciated.
"Whatever's happening here on Earth, the universe remains awesome."
...Have truer words ever been spoken?
The Earth's atmosphere is mostly Nitrogen followed by Oxygen.
@@scottdorfler2551 Not true throughout time....
Is "truer" the right word? Shouldn't be "more true"? I know both sound weird and English is barely my second language so is a genuine question
if there is noone to appreciate our appreciation, does our appreciation really matter?
Layth??
Oh so now we're gonna have Torus-Earthers too ?
You don't believe that earth is a giant donut?
Donut-Earf Theory
It's actually a coffee cup.
... ask any topologist
Earth could be a torus, if we get the earth spinning fast enough that it begins to overcome its internal gravity but not fast enough that it tears itself apart.
Unfortunately, I read about that Idea in 2018
9:50 "here is our best thinking on a most likely scenario"
me: Finally.
10 s later: Ok, you've lost me.
Paused this in the first minute, just to acknowledge the pure brilliancy in ”whatever happens here on Earth, the Universe remains awesome”. Thank you!
I don't get what what's brilliant about this
Oh
What a time, RUclipsrs having to work from home
Ikr like that's totally not how they work even in normal times
@@spyrex3988 My point was that being a RUclipsr is a job where people go to a studio to film, when it used to all be from home and it has returned to that
@@spyrex3988 in this day in age many youtubers don't produce at home anymore. The big ones have studios since... Let me guess RayWilliamJohnson and that's... 10-7 years ago?
Now they have to work from home, because a studio ain't for one person to manage
99% of them always did that though
@@Pauly421 That's kinda my point, they used to work from home but now they don't. Not that hard to understand
4:15 *YOU MUST CONSTRUCT ADDITIONAL PIONS!*
Finally a PBS Space Time video i can understand from start to finish.
I love the way humor is such a big part of what makes space time so great.
Humour is what makes HUMANS so great, in spite of their short grubby lives. Space/time is simply a way to describe what is, and a quest to understand why (in spite of the fact most of us won't live long enough to see the answers to most of our questions).
@@AnthonyIlstonJones well said Anthony
Honestly, I really like the apartment vibe, it feels much more natural than the floating space background
" and this activity is long past... or is it?"
That's some Vsouce questioning right there
Whatever is happening here on Earth this channel remains awesome too
Thank you! Your work end effort for educating and entertaining us is much appreciated in this time! Greetings from Prague, Czech Republic.
2:05 *Vsauce music intensifies*
Thank you Matt and everyone at PBS Digital Studios for keeping space time going right now! Although according to the anthropic principle we can only be living in a universe where space time persists through a global pandemic
I have questions. 1. Will have all the minor/ mini black holes merge in our Milky Way Galaxy. Will that Also add to the formation of the FermiBubble. 2. Why are all the black holes in our galaxy holes not merging ? If their Gravity is that strong, why are they attracting each other ? 3. Concerning S2 star that circle Sag A*, just how long will its lose its mass when is the nearest “food source” to it ? 4. Around 2030, a cloud of gas will feed Sag A*, will we have a front seat row to see the light bursting out ? Or is all still X ray radiation
Hahahaha, trueeee 😹😹
Sound is WAY better in this video than its been for a few videos (for past few months or so)
Everyone: corona virus
PBS Space Time: Was The Milky Way A Quasar?
Eric Weinstein: Geometric Unity theory
Me: Ah yes, this universe is made out of universe
Aaand here we all are..
12:45 Vsauce music starts playing
2:06 too lol
Hey PBS, Matt here.
Or is it...?
I think 2:06 was the most vsauce "...or is it?" I've ever heard (aside from himself).
12:45... and again haha
Hope all is well out there in PBS land. That's an interesting picture in the back, there.
It's ugly imo.
@@gabor6259 I like it.
You never know
He said before it is his home and it was painted by his partner.
"The Earth was created on Sunday the 21st of October, 4004 B.C. at exactly 9:00am". Would that be GMT or UGT (Universal God Time)?
I would guess that he meant Jerusalem time
It was something God did in the meantime, so GMT.
@@Wick9876 gaaaaahhhhhhhh
He ran out scrape paper. The Sunday 21st of Oct @ 9am part, was when he was scheduled to lead communion.
14:49 It's the other way around. Uranium 235 has a shorter half life (a few hundred million year) than the half life of uranium 238 (a few billion years).
Google says you are correct.
Yoda says correct are you
Shoutout to our boy Matt for keeping up the awesome work during these times. He's our generation's Carl Sagan, in my opinion.
Neil Tyson is also engaged and entertaining, but only Matt is as suave as Carl Sagan. ;)
@@Yora21 Neil Tyson is the Carl Sagan of the TV, Matt is the Carl Sagan of RUclips
Wow!! This episode was particularly brilliant! And during a pandemic??? Give this writer a massive raise PBS!!! Genius!!
that background image is genuinly perfect.
Thank you! I learn not only the astronomy and physics from your videos, but the English language, too.
Cool. I learned a bit of German for the German version of kurzgesagt.
I like better the american one is easyer to me to understand but this guy is pritty clear to me.
Number 1: Thank you for continuing PBS Spacetime. I totally love this program.
Number 2: If the current theory for the age of the universe is incorrect, ... ?
What do you mean by the second point?
Great job guys! Glad to have y'all on the Tube droppin' the knowledge. Stay safe and keep on keepin' on.
This was an interesting video. I liked it. I have always liked learning about astronomy and space sciences. They are my favorite fields of science. The lack of a green screen has changed some things in these videos, but the quality of them hasn't dropped that much. Good work.
0:34 I cant be the only one expecting a "duration of spacetime" at the end of that sentence.
Yeah
It's a trick: spacetime has no durations, only intervals.
The irony: You *are* floating somewhere out in space :D
Haha love that expression at 12:45.. when you realize that you've done a few "or will it?"s already 🤣
I absolutely LOVE this channel, I learn something new and amazing everytime I watch. Thank you so much for what you do and keep it up.
I feel like I need to watch the these 10 times back to back videos to understand them properly.
The sad part, I can’t do that, since someone always finds a way to bother me
Same.
Thank you for giving Terra’s sidereal star sign . . . I always eschew the traditional calendar, too!
Taurus fits
Very cool to hear humble and helpful teachers!
Thanks Matt, I deeply love this show! It really enriches my life now since more than one year! Please always keep doing your magnificent work!
This camera capture of you looks more cinematic / smooth / balanced lighting than the (actual) segments. 🤷🏽♂️ Well done.
so Earth is a torus?
EVERYTHING FINALLY MAKES SENCE
Except you can't spell.
Love your brow pressure and facial expressions during the narrative
Whatever happens on earth, the universe remains completely indifferent to us. That will be the next thing folks, a comet.
Its always fun, as a geochemist, to see other scientists have to wade through background noise only to find something completely different than what they expected to find. Great show, and I'm glad to see this is still up! Keep up the good work, and stay safe!
So how do you feel about mantle chemistry?
Good to know Matt made it back to earth. I wonder what the age difference is now between him and his twin brother?
How he did that at 0:22 without a green screen is beyond my mathematical pixelated comprehension!
Great content again. Also impressed at the lighting and sound quality at home.
I waited for the creepy horror movie background music - and wasn't disappointed. 👽
Thanks for mentioning Clair Patterson :) for some reason he gets often omitted despite his huge contributions to science and public health. Thanks to him we no longer have leaded fuel.
Fantastic episode!!! Thank you, Dr. Dowd and crew!
That artwork is so subtle and abstract and cool
I knew it! He resides in a golden pyramid, floating above the galaxy.
10:11 Anyone else started laughing out loud at the sheer ridiculous magnitudes of the scales in this simulation? Few things can cheer me up like science can!
Thank you guys. Truly awesome. Can we have more of this during the lockdown please.
Stay safe & Be careful Sir... You are more than a youtube mentor for me and most of us
5:54 Well, like almost everything else, it's gonna be released at least a few month later due to the current crisis
Universe = Awesome
Matt's Apartment = Unfinished Walls
No.... Wait.... that's ART!
Thank you for the video and recommendations! Stay healthy Matt and everyone who makes Space Time.
Thank you, PBS SpaceTime!!! These videos make my day!
There is a question that haunted me since the episode called "The Impossibility Of Perpetual Motion Machines". If most of the conceived (even though they wouldn't work) perpetual motion machines use gravity as an external source of energy why are they called so since they get energy from an external source which is the Earth's gravitational pull ?
Love the series 👍👍👍❤
simple answer: most people trying to make perpetual motion machines dont think about that.
more complex answer: gravity has no energy when not in a system. therefore whenever you talk about gravitational energy, technically your talking about gravitational energy of the system. because a perpetual motion machine uses gravitational energy that means that the earth is part of the system, and therefore part of the perpetual motion machine. if you think about it like this (which is admittedly a little weird) there is no external source of energy of the system/machine, but it is transferring it from the gravitational potential to kinetic energy. however the total energy stays constant. hopefully this makes sense.
gravity is a conservative force, if the system cycles and comes back to the same initial state after some time, you will extract no energy from gravity
Perpetual machines try to get power from gravity from a plave it doesn't exist, which is the machine itself.
A machine that uses gravity and works is the hydro energy plants, that take water with high potential energy losing energy while moving from a high ground to a lower ground and take energy from this movement. But that is only possible because the water had potential energy in a high altitude.
A perpetual motion machine tries to both take petential energy from an object in high altitude while also giving energy to an object in a lower altitude while no losing energy to friction etc.
Our hydro plants are only possible because our sun gives energy to water, which evaporates, rises and gains potential energy and then fall on montains and then rivers that lose potential energy, the point where we try to get some of this potential energy.
After pondering this question for some time, here's my conclusion (although I'm not sure I understand the problem, there is nothing in the definition of perpetual motion machines that prevents them from getting energy initially).
At least some of the energy the machines take from the gravitational field they give back right?
And because they give energy back, there is a limit on the amount of energy the machines overall take from the gravitational field right?
So if you rephrase the idea of perpetual motion machines as machines that take a finite amount of energy over their operation time and run forever, you would still get the basic idea covered and you would allow for machines to take energy from an external source even forever, as long as the overall amount of energy they took overall is finite.
It is very easy to make perpetual motion. Superfluids and supersolids can do it. Add a few other ingredients, and some fancy physics on 50+ years, and you have a machine. Does it make energy? Maybe. But it can still be a machine with perpetual motion.
Cool helium down to extreme low temperature. Helium can be implemented with other materials, and crystalline materials as well.
Etc etc...
First a disclaimer: I love astrophysics. But now to my point: I really couldn't be an astrophysicist... All they get is terribly noisy data and then they have to make models, calculate probabilities, and redefine their models until they finally reach their desired 42 sigma. It doesn’t change the huge uncertainties of the original data, but the maths checks out, so they need to be content. I would hate that. I love clean data, and I love the conclusions you can get from them. But astrophysics seldomly has than luxury. I really would love to be an astrophysicist. But I can’t ;)
The exact reason I decided not to study astrophysics but civil engineering
Funnily enough, that's the appeal for me. The sleuthing, as it were. You can make an entire career out of carefully working out one theory.
that was one of your best ones. you did a really good job!!
Massive props for still putting out content.
_@Matt_ - When the video cuts to your _questionably_ handsome face, the image quality in today's video is way superior to the pre-COVID-19 videos. For example: The lighting on your face is much nicer (it isn't extreme -- not too flat or too harsh -- yet still has good contrast). I like that the light comes mostly from the left but seems relatively diffuse. The art in the background makes an exceptionally excellent backdrop that is supremely pleasing -- many thanks to the artist!!! The focal length and field of view of the lens creates a much nicer image of you. In short, whenever you're allowed to crawl back out of your domicile, your Space Time "studio" would do well to duplicate the video setup of your home as it was captured today. Most excellent, dude! ;-)
Hope you find the courage to just ask him out on a date.
His partner made that painting. Last week's episode comment section.
Shooters shoot
@@jonb5310 Not the best choice in pick-up lines, lol - _"...your questionably handsome face"_
4:30 Gotham galaxy is in trouble!
This is the most awesome thing I have seen within recent memory, at least! I can't even imagine what it would be like to live in a quasar galaxy!
The writing has only improved from great to greater and I'm loving every minute!
As soon as we hit theory 2, a thought started nagging at me. 1 doesn't work, 2 doesn't work; me: why not both? That's when you know you're thinking like a physicist *\o/*
Monocausal explanations for complex dynamic systems are usually nonsensical.
@@Yora21 This is dependent entirely on perspective, and sometimes unknown evidence.
Still missing something tho.
@@BassNinja always
Have anybody remembered to mention the "Last Thursday" hypothesis for the age of the earth?!
Or the five-minute hypothesis for that matter?
He addresses a very similar idea in the Boltzmann Brain episode; worth checking out if you’re interested in the topic, which is more philosophy of science than science proper
I only ever bring up that particular theory when arguing about science vs religion/pseudoscience. It makes a very clear example of something that is inherently unfalsifiable and thus is in no way scientific.
aidan levy that’s why you need to have FAITH /s
No, but I do remember Last Tuesdayism. Why are you 2 days late? Did CoVid delay that too?
Y'all are so awesome, thank you!
Great show by a great presentation! Human, down to each, great communication and exceptional ability to make you with an easy way to understand.
Hey, when is the anisotropic universe video coming out, cant wait, did that paper actually shake cosmology?
If the universe is anisotrpic then for sure my work is right. The universe has 7 density levels so it cant be isotropic at all.
Can you guys make a chart of the order of watching your videos? A lot of your videos build up on previous ones so having a chart to follow would be nice. Kinda like Avengers cinematic universe chronological order :3
how about you do that
They have a few playlists that are in the correct order for each topic. Black Holes, Quantum Field Theory, Dark Matter & Dark Energy for example, along with a few other topics.
@@NTMA11 I don't know the order, i wouldn't mind doing it. Some playlists are ordered backwards too :|
Great insights, as usual. Also, I love your painting!
I'm really thankful the @PBSSpacetime is still producing awesome content!!
Isn't it a bit odd to talk of the Milky Way “being” an AGN rather than *having* one?
What is agn?
@@MarkSmith-wb2eh active galactic nuclei
@@paulthomas963 I just mean the terminology seems weird-the Milky Way is a galaxy, not a galactic nucleus.
I suppose “AGN” could be shorthand for “galaxy with an AGN” by synecdoche. That sort of thing always bothers me but probably because I spend too much time writing code.
I think I prefer this background more... a bit more relaxing and “human”(?)
Yeah, it's really comfy. I like it more too.
No I like it when he is floating in space 😆
Pierson's Puppeteers: "OK, we're out of here."
I don't want to live in a universe where a quasar can't grow up to be a galaxy. If he wants to.
Appetite for destruction? I'm totally fine with that kind of stuff!
I've read that scientists sometimes detect the reflection of an outburst after the outburst happened when it's reflected from a reflective nebula.
Is it possible that we could see such an echo from this rather recent outburst or would it be too faint?
Our galaxy is 100000 light years across. Everything in our galaxy is way too close to see a million-year-past reflection.
@@KohuGaly The milky way is only 100,000 ly across, so it would be possible! There is even a class of objects that are gas clouds that are getting hit by radiation from a from a former active galaxy. They also have my favorite name ever: Voorwerpjes en.wikipedia.org/wiki/Hanny%27s_Voorwerp
@@KohuGaly Yes, but since our observations cover only a thousand years if you're feeling really generous, being able to expand that range to a 50 or a 100 times is already pretty neat.
Wait. Just wait. In the next hundred to 500 years we will have a way to utilize these forces, and observe past time.
Oh wait, you and I won't live that long, sorry.
The phrase "the energy of 100,000 super novi is a serious option the other option is way more terrifying..." Is why space is both terrifying and wonderfully amazing it's like imagine the most powerful explosion, explosions that are some of the the brightest things in the universe, now multiply that by 100,000 and is less scary than the other option the universe is truly awe inspiring
Thank you so much for continuing this nerdy craziness even in this pandemic!!
4:10 How can two colliding protons generate a neutral particle? Or is the charge carried away by the "Plus some other stuff" ?
The charge of the system of two colliding protons will be conserved. If you are checking proton-antiproton then it is true. However for proton-proton there can be fusion for higher energy collisions, with gamma ray emission(neutral).
@@l0_0l45 This question arose from 4:10
Your answer doesn't make much sense. I stated two protons, not a proton and an anti-proton. When two proton smash there's a charge of +2 that needs to be conserved. I can only imagine that it gets carried away by the other stuff he mentioned. I asked for confirmation of that.
If you are thinking pions, then depending of the charge of the pions, the decays will never violate C-Symmetry.
See the decay products on the Wikipedia page to resolve your query en.wikipedia.org/wiki/Pion
@@l0_0l45 It's not about the pion!
It's kinda weird to see you giving a speech inside. I usually see you in outer space. 😁
It's a fact as he filmed this video, he was still literally floating around Sag A*.
House is on Earth, Earth in Space. House is space!
Is it weird doing these episodes from home? It's all good, your videos are just as good! Everything sounds and looks just as great. (thumbs up to the video editor!)
Interesting and worthwhile video.