Was the Milky Way a Quasar?
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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
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@mattweston1212 4 жыл бұрын
"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!
@amymason156 4 жыл бұрын
Oh, I thought it was a torus?
@mattweston1212 4 жыл бұрын
@@amymason156 I think (may be wrong) that because it's the bull, it's the same etymology as minotaur...
@TheExoplanetsChannel 4 жыл бұрын
True
@mjbull5156 2 жыл бұрын
Taurus is an Earth sign.
@bencushwa8902 4 жыл бұрын
"Whatever is happening here on Earth, the Universe remains awesome." Thank you.
@zes3813 4 жыл бұрын
wrr
@edholohan 4 жыл бұрын
Heavy...
@fractualquasar3951 4 жыл бұрын
@@zes3813 yep
@Daisukiii Жыл бұрын
@@michelschildmeijer7457 The rest remains awesome
@darioinfini 4 жыл бұрын
It just occurred to me the role Matt (and others like him) serve. Imagine if (or remember when) Matt wasn't on KZfaq 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!
@maan7715 4 жыл бұрын
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!
@Gogglesofkrome 4 жыл бұрын
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.
@viliml2763 4 жыл бұрын
@@maan7715 Except Neil deGrasse Tyson talks more about bullshit than actual science.
@ciCCapROSTi 4 жыл бұрын
@@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.
@TheGhostGuitars 4 жыл бұрын
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.
@Astro_Ape 4 жыл бұрын
"Whatever is happening here on earth, the universe remains awesome!" I needed that...
@christosvoskresye 4 жыл бұрын
It sounds better than, "Whatever is happening here on earth, the rest of the universe remains barren and lifeless."
@teckyify 4 жыл бұрын
Veri Xcvoin I bet tons of slime 😂
@teckyify 4 жыл бұрын
Yes, the cancer statistics agree 😂⚰️
@chimp9465 4 жыл бұрын
@@verixcvoin1432 what are you even talking about, thats unrelated to the original comment...
@chimp9465 4 жыл бұрын
@@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
@Lord_RFAS 4 жыл бұрын
"...has been relatively calm, for as long as we've been observing it." That made me chuckle, considering astronomical time-scales.
@verixcvoin1432 4 жыл бұрын
Yeah, like, literally anything could have happened by now. Perhaps literal evidence of alien life could be behind the shroud, or great remains...
@scottdorfler2551 4 жыл бұрын
Both blinks of an eye.
@WanderTheNomad 4 жыл бұрын
@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.
@Lord_RFAS 4 жыл бұрын
@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
@TheGhostGuitars 4 жыл бұрын
@@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!
@nolanwestrich2602 4 жыл бұрын
Okay, my ten minutes are up, time to get back to... [PBS Space Time uploads] OH COME ON.
@Omar-em7rl 4 жыл бұрын
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.
@Omar-em7rl 4 жыл бұрын
@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.
@shahman76 4 жыл бұрын
I was going to go to sleep but then this drops.
@guystokesable 4 жыл бұрын
Haha, I'm sitting on the toilet far too long I should be back to work.
@benjaminolsson2162 4 жыл бұрын
@@guystokesable Boss makes a dollar while I make a dime. That's why I poop on company time. 😏
@MrAranton 4 жыл бұрын
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.
@mnomadvfx 2 жыл бұрын
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.
@bowenmadden6122 10 ай бұрын
@mnomadvfx well, with FTL transport comes FTL postal service. XD
@joshyoung1440 6 күн бұрын
@@mnomadvfx dumb, communications are a subset of travel, you get travel you get them both
@joshyoung1440 6 күн бұрын
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
@jacek5809 4 жыл бұрын
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.
@Blubb5000 4 жыл бұрын
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).
@andie2809 4 жыл бұрын
@@Blubb5000 😂🤣😂🤣 pictures!😂😂😂😂😂😂😂
@TheGhostGuitars 4 жыл бұрын
@@Blubb5000 Bubbles from both ends? *BURP* ... *POP* *POP* LOL Thanks, needed that laugh. Been a tad depressed lately from being shut in so long. :]
@ultrasonicradiation 4 жыл бұрын
Most humans apes cannot understand astrophysics, so ape talk helps the lesser human apes to understand difficult concepts.
@chrismanuel9768 2 жыл бұрын
@@ultrasonicradiation We're truly/great/ apes.
@dreammfyre 4 жыл бұрын
”Galactic Core” *painful Mass Effect flashbacks*
@Fomasy 4 жыл бұрын
*painful Star trek V flashbacks*
@mynameischad96 4 жыл бұрын
Don't forget No Man's Sky!
@SrmthfgRockLee 4 жыл бұрын
@🐦MrSoTiredOfTheNewKZfaqs😅 whats ptsd
@hamstsorkxxor 4 жыл бұрын
*ASSUMING DIRECT CONTROL*
@verixcvoin1432 4 жыл бұрын
Haha. Perfect comment. All sci fi is great. Wishing you all the best with the wierdness lately
@BUTTTER713 4 жыл бұрын
Whats an astrophysicists favorite candy? Starbursts
@annaliseoconner9266 4 жыл бұрын
I figured it would be Astropops
@npc1199 4 жыл бұрын
Thought it was milky way
@verixcvoin1432 4 жыл бұрын
Thought it was smarties
@roodlespoodles7956 4 жыл бұрын
Mars Bars.
@justabrother 4 жыл бұрын
Nerds.
@sonofasailir35 4 жыл бұрын
Thanks for the second video in a row that doesn’t hurt my brain to try to understand
@Yora21 4 жыл бұрын
I'm sure we can get a Penrose diagram somewhere to make some quick Lorentz transformations.
@Kroggnagch 3 жыл бұрын
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.
@rohandubey3268 3 жыл бұрын
Lmao Samee XD
@publiconions6313 3 жыл бұрын
Lol... wonder if mental-masochism is a thing?
@dougdouglas3696 3 жыл бұрын
I 2nd that...
@adamdansiger 4 жыл бұрын
Number 3: Why didn't they call it a "Hubble bubble?" Seems like they missed an opportunity.
@not2tired 3 жыл бұрын
Especially because it is a double bubble
@balcius 3 жыл бұрын
Kenny Tritch - Double Hubble bubble trouble.
@jensphiliphohmann1876 3 жыл бұрын
A Hubble bubble is what I'd call the part of the universe visible from Earth.
@matthewdavies2057 3 жыл бұрын
Hubba Bubba? Been done!
@skinnex3236 3 жыл бұрын
@@balcius doubel hubble bubbel troubel 2: bubbel boogaloo
@aniaugus 4 жыл бұрын
10:55 - That one dish looking other way: Nope, not gonna look xD
@BrianYYH 4 жыл бұрын
Hahaha XD
@igorastral4816 4 жыл бұрын
Niiice, there's the rebellious one!
@SixDasher 4 жыл бұрын
"And on our left..." "The OTHER left... oh"
@SofaKingShit 4 жыл бұрын
It knows that the Earth is flat.
@PhilBoswell 4 жыл бұрын
It's the lookout, making sure nobody sneaks up on them ;-)
@CloudsGirl7 4 жыл бұрын
"Whatever's happening here on Earth, the universe remains awesome." ...Have truer words ever been spoken?
@scottdorfler2551 4 жыл бұрын
The Earth's atmosphere is mostly Nitrogen followed by Oxygen.
@joshuawigginton7956 4 жыл бұрын
@@scottdorfler2551 Not true throughout time....
@alejandroericklazarte 4 жыл бұрын
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
@botfred743 4 жыл бұрын
if there is noone to appreciate our appreciation, does our appreciation really matter?
@verixcvoin1432 4 жыл бұрын
Layth??
@drewdavis2392 4 жыл бұрын
"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.
@uoppsdnsu4266 4 жыл бұрын
Thanks for working hard to keep this going even when working at home! Greatly appreciated.
@kevinocta9716 4 жыл бұрын
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.
@fabiensangouard7459 4 жыл бұрын
Oh so now we're gonna have Torus-Earthers too ?
@Gaehhn 4 жыл бұрын
You don't believe that earth is a giant donut?
@Electronic424 4 жыл бұрын
Donut-Earf Theory
@DFPercush 4 жыл бұрын
It's actually a coffee cup. ... ask any topologist
@MegaAwesomeNick 4 жыл бұрын
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.
@gavxmas 4 жыл бұрын
Unfortunately, I read about that Idea in 2018
@mirakodus1 4 жыл бұрын
9:50 "here is our best thinking on a most likely scenario" me: Finally. 10 s later: Ok, you've lost me.
@eager6874 4 жыл бұрын
Paused this in the first minute, just to acknowledge the pure brilliancy in ”whatever happens here on Earth, the Universe remains awesome”. Thank you!
@TheRABIDdude 4 жыл бұрын
I don't get what what's brilliant about this
@TheExoplanetsChannel 4 жыл бұрын
Oh
@SlowToe 4 жыл бұрын
I love the way humor is such a big part of what makes space time so great.
@AnthonyIlstonJones 3 жыл бұрын
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).
@SlowToe 3 жыл бұрын
@@AnthonyIlstonJones well said Anthony
@calebj1442 4 жыл бұрын
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
@Leafisa 4 жыл бұрын
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
@realzachfluke1 2 жыл бұрын
Hahahaha, trueeee 😹😹
@handigeharry3065 4 жыл бұрын
Finally a PBS Space Time video i can understand from start to finish.
@peterc7144 4 жыл бұрын
Thank you! Your work end effort for educating and entertaining us is much appreciated in this time! Greetings from Prague, Czech Republic.
@theghostkidltu2878 4 жыл бұрын
" and this activity is long past... or is it?" That's some Vsouce questioning right there
@precumming 4 жыл бұрын
What a time, KZfaqrs having to work from home
@spyrex3988 4 жыл бұрын
Ikr like that's totally not how they work even in normal times
@precumming 4 жыл бұрын
@@spyrex3988 My point was that being a KZfaqr 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
@gandalfthegrey7135 3 жыл бұрын
@@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
@Pauly421 2 жыл бұрын
99% of them always did that though
@precumming 2 жыл бұрын
@@Pauly421 That's kinda my point, they used to work from home but now they don't. Not that hard to understand
@justdave9610 4 жыл бұрын
Whatever is happening here on Earth this channel remains awesome too
@joesperspective382 4 жыл бұрын
Everyone: corona virus PBS Space Time: Was The Milky Way A Quasar?
@DerekMoore82 4 жыл бұрын
Eric Weinstein: Geometric Unity theory
@gandalfthegrey7135 3 жыл бұрын
Me: Ah yes, this universe is made out of universe
@a_diamond 2 жыл бұрын
Aaand here we all are..
@Nathan-pk1tb 4 жыл бұрын
Honestly, I really like the apartment vibe, it feels much more natural than the floating space background
@hoodglasses8237 4 жыл бұрын
Shoutout to our boy Matt for keeping up the awesome work during these times. He's our generation's Carl Sagan, in my opinion.
@Yora21 4 жыл бұрын
Neil Tyson is also engaged and entertaining, but only Matt is as suave as Carl Sagan. ;)
@brandfire1027 4 жыл бұрын
@@Yora21 Neil Tyson is the Carl Sagan of the TV, Matt is the Carl Sagan of KZfaq
@user-su9vx1uf3m 4 жыл бұрын
Thank you! I learn not only the astronomy and physics from your videos, but the English language, too.
@nafrost2787 4 жыл бұрын
Cool. I learned a bit of German for the German version of kurzgesagt.
@espaciohexadimencionalsern3668 4 жыл бұрын
I like better the american one is easyer to me to understand but this guy is pritty clear to me.
@michaeldeibert9379 4 жыл бұрын
Wow!! This episode was particularly brilliant! And during a pandemic??? Give this writer a massive raise PBS!!! Genius!!
@sdfkjgh 4 жыл бұрын
4:15 *YOU MUST CONSTRUCT ADDITIONAL PIONS!*
@adamdansiger 4 жыл бұрын
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, ... ?
@Adityarm.08 2 жыл бұрын
What do you mean by the second point?
@deefdragon 4 жыл бұрын
that background image is genuinly perfect.
@saxoman1 4 жыл бұрын
Sound is WAY better in this video than its been for a few videos (for past few months or so)
@grokeffer6226 4 жыл бұрын
Hope all is well out there in PBS land. That's an interesting picture in the back, there.
@gabor6259 4 жыл бұрын
It's ugly imo.
@grokeffer6226 4 жыл бұрын
@@gabor6259 I like it.
@verixcvoin1432 4 жыл бұрын
You never know
@DavidKennyNZL 4 жыл бұрын
He said before it is his home and it was painted by his partner.
@mementomori7160 4 жыл бұрын
12:45 Vsauce music starts playing
@Toven_WaveWatcherFi 4 жыл бұрын
2:06 too lol
@RogueRM 4 жыл бұрын
Hey PBS, Matt here.
@marc.ristau 4 жыл бұрын
Or is it...?
@aaroncasteel2281 4 жыл бұрын
Great job guys! Glad to have y'all on the Tube droppin' the knowledge. Stay safe and keep on keepin' on.
@KnighteMinistriez 4 жыл бұрын
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.
@parzh 4 жыл бұрын
2:05 *Vsauce music intensifies*
@Saitama62181 4 жыл бұрын
"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)?
@michaelsommers2356 4 жыл бұрын
I would guess that he meant Jerusalem time
@Wick9876 4 жыл бұрын
It was something God did in the meantime, so GMT.
@Tubluer 4 жыл бұрын
@@Wick9876 gaaaaahhhhhhhh
@eds1942 3 жыл бұрын
He ran out scrape paper. The Sunday 21st of Oct @ 9am part, was when he was scheduled to lead communion.
@anugrahmathewprasad172 4 жыл бұрын
Haha love that expression at 12:45.. when you realize that you've done a few "or will it?"s already 🤣
@erlangerklaviertrio 4 жыл бұрын
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!
@AJBlue98 4 жыл бұрын
Thank you for giving Terra’s sidereal star sign . . . I always eschew the traditional calendar, too!
@nmarbletoe8210 4 жыл бұрын
Taurus fits
@geologist_luna 4 жыл бұрын
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!
@garethdean6382 4 жыл бұрын
So how do you feel about mantle chemistry?
@chrislaws4785 4 жыл бұрын
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.
@milkismurder 4 жыл бұрын
That artwork is so subtle and abstract and cool
@adamcartisano313 4 жыл бұрын
I think 2:06 was the most vsauce "...or is it?" I've ever heard (aside from himself).
@adamcartisano313 4 жыл бұрын
12:45... and again haha
@Qunia 4 жыл бұрын
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
@skarletrose1 4 жыл бұрын
Same.
@silentwisdom7025 3 жыл бұрын
Very cool to hear humble and helpful teachers!
@Ruby321123 4 жыл бұрын
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!
@jbghumanjr 4 жыл бұрын
This camera capture of you looks more cinematic / smooth / balanced lighting than the (actual) segments. 🤷🏽♂️ Well done.
@TheUmad123 4 жыл бұрын
0:34 I cant be the only one expecting a "duration of spacetime" at the end of that sentence.
@baguette745 4 жыл бұрын
Yeah
@richardbraakman7469 4 жыл бұрын
It's a trick: spacetime has no durations, only intervals.
@DavidKennyNZL 4 жыл бұрын
Great content again. Also impressed at the lighting and sound quality at home.
@enterprisesoftwarearchitect 4 жыл бұрын
Fantastic episode!!! Thank you, Dr. Dowd and crew!
@nafrost2787 4 жыл бұрын
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).
@DavidKennyNZL 4 жыл бұрын
Google says you are correct.
@not2tired 3 жыл бұрын
Yoda says correct are you
@morpheox 4 жыл бұрын
The irony: You *are* floating somewhere out in space :D
@dudeperson3 3 жыл бұрын
The writing has only improved from great to greater and I'm loving every minute!
@joshuagharis9017 2 жыл бұрын
Love your brow pressure and facial expressions during the narrative
@D.Eldon_ 4 жыл бұрын
_@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! ;-)
@jonb5310 4 жыл бұрын
Hope you find the courage to just ask him out on a date.
@Xeridanus 4 жыл бұрын
His partner made that painting. Last week's episode comment section.
@editorrbr2107 4 жыл бұрын
Shooters shoot
@georgehugh3455 4 жыл бұрын
@@jonb5310 Not the best choice in pick-up lines, lol - _"...your questionably handsome face"_
@bartekraglewski2697 4 жыл бұрын
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.
@KonekoEalain 4 жыл бұрын
Thank you for the video and recommendations! Stay healthy Matt and everyone who makes Space Time.
@roberthanleytortora7405 4 жыл бұрын
that was one of your best ones. you did a really good job!!
@thekillshootable 4 жыл бұрын
Good to know Matt made it back to earth. I wonder what the age difference is now between him and his twin brother?
@MrMomo182 4 жыл бұрын
I knew it! He resides in a golden pyramid, floating above the galaxy.
@808bigisland 4 жыл бұрын
Thank you guys. Truly awesome. Can we have more of this during the lockdown please.
@GoingWestMedia 4 жыл бұрын
Great insights, as usual. Also, I love your painting!
@dariusbizimana2590 4 жыл бұрын
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 👍👍👍❤
@3pizza43 4 жыл бұрын
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.
@KekusMagnus 4 жыл бұрын
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
@jvcscasio 4 жыл бұрын
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.
@nafrost2787 4 жыл бұрын
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.
@verixcvoin1432 4 жыл бұрын
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...
@PainSled 4 жыл бұрын
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!
@shaggystone6397 4 жыл бұрын
Whatever happens on earth, the universe remains completely indifferent to us. That will be the next thing folks, a comet.
@Bassotronics 4 жыл бұрын
How he did that at 0:22 without a green screen is beyond my mathematical pixelated comprehension!
@7STB7 4 жыл бұрын
I waited for the creepy horror movie background music - and wasn't disappointed. 👽
@PaulPaulPaulson 4 жыл бұрын
5:54 Well, like almost everything else, it's gonna be released at least a few month later due to the current crisis
@zantrex4 4 жыл бұрын
Thank you, PBS SpaceTime!!! These videos make my day!
@maxreynolds3570 4 жыл бұрын
Thank you so much for continuing this nerdy craziness even in this pandemic!!
@swancrunch 4 жыл бұрын
so Earth is a torus? EVERYTHING FINALLY MAKES SENCE
@edholohan 4 жыл бұрын
Except you can't spell.
@RagaarAshnod 4 жыл бұрын
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/*
@Yora21 4 жыл бұрын
Monocausal explanations for complex dynamic systems are usually nonsensical.
@verixcvoin1432 4 жыл бұрын
@@Yora21 This is dependent entirely on perspective, and sometimes unknown evidence.
@BassNinja 4 жыл бұрын
Still missing something tho.
@verixcvoin1432 4 жыл бұрын
@@BassNinja always
@njm3211 4 жыл бұрын
Really elegant artwork on your wall.
@ZedaZ80 4 жыл бұрын
Y'all are so awesome, thank you!
@vpr1422 4 жыл бұрын
Hey, when is the anisotropic universe video coming out, cant wait, did that paper actually shake cosmology?
@espaciohexadimencionalsern3668 4 жыл бұрын
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.
@sadderwhiskeymann 4 жыл бұрын
4:30 Gotham galaxy is in trouble!
@suraj_bini 4 жыл бұрын
Stay safe & Be careful Sir... You are more than a youtube mentor for me and most of us
@mikebowlesmusic4515 4 жыл бұрын
This is wonderful. Helps keep me, earth and everything else in perspective.
@AnthonyIlstonJones 3 жыл бұрын
I don't believe the human mind can really grasp the true perspective of how insignificant we actually are. Even the fact that most of our names won't even be remembered by our own descendants a couple of centuries from now is insignificant in how insignificant we are (and that's just on the scale of our rather insignificantly-sized galaxy). We are irrelevant, and yet we strive to understand the minutest workings of the entire Universe! Humans are absolutely bonkers imo.
@xBris 4 жыл бұрын
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 ;)
@EquiliMario 4 жыл бұрын
The exact reason I decided not to study astrophysics but civil engineering
@kaitlyn__L 4 жыл бұрын
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.
@williammorton8555 4 жыл бұрын
Universe = Awesome Matt's Apartment = Unfinished Walls No.... Wait.... that's ART!
@arminschmidt3888 4 жыл бұрын
Loved the home episode, great taste by the way Matt.
@robbabcock_ 4 жыл бұрын
I'm glad to see Space Time marching on!
@michmich2045 4 жыл бұрын
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?
@KohuGaly 4 жыл бұрын
Our galaxy is 100000 light years across. Everything in our galaxy is way too close to see a million-year-past reflection.
@spacemarts 4 жыл бұрын
@@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
@Yora21 4 жыл бұрын
@@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.
@verixcvoin1432 4 жыл бұрын
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.
@jyrinx 4 жыл бұрын
Isn't it a bit odd to talk of the Milky Way “being” an AGN rather than *having* one?
@MarkSmith-wb2eh 4 жыл бұрын
What is agn?
@jrobinson1215 4 жыл бұрын
@@MarkSmith-wb2eh active galactic nuclei
@jyrinx 10 ай бұрын
@@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.
@sylvainchartrandcd9827 4 жыл бұрын
Great show by a great presentation! Human, down to each, great communication and exceptional ability to make you with an easy way to understand.
@pasanmanawadu1137 4 жыл бұрын
Massive props for still putting out content.
@theglobalwarming6081 4 жыл бұрын
I think I prefer this background more... a bit more relaxing and “human”(?)
@OblivionFalls 4 жыл бұрын
Yeah, it's really comfy. I like it more too.
@missymarie4103 3 жыл бұрын
No I like it when he is floating in space 😆
@milos_radovanovic 4 жыл бұрын
Have anybody remembered to mention the "Last Thursday" hypothesis for the age of the earth?!
@milos_radovanovic 4 жыл бұрын
Or the five-minute hypothesis for that matter?
@drewlop 4 жыл бұрын
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
@aidanlevy2841 4 жыл бұрын
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.
@gardenhead92 4 жыл бұрын
aidan levy that’s why you need to have FAITH /s
@Tubluer 4 жыл бұрын
No, but I do remember Last Tuesdayism. Why are you 2 days late? Did CoVid delay that too?
@omega311888 4 жыл бұрын
you all stay safe, sir! thank you all for continuing to educate us!
@gavxmas 4 жыл бұрын
Procession of the equinoxes. Made my day!
@Xaiff 4 жыл бұрын
It's kinda weird to see you giving a speech inside. I usually see you in outer space. 😁
@GGoAwayy 4 жыл бұрын
It's a fact as he filmed this video, he was still literally floating around Sag A*.
@Yora21 4 жыл бұрын
House is on Earth, Earth in Space. House is space!
@paulmichaelfreedman8334 4 жыл бұрын
4:10 How can two colliding protons generate a neutral particle? Or is the charge carried away by the "Plus some other stuff" ?
@l0_0l45 4 жыл бұрын
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).
@paulmichaelfreedman8334 4 жыл бұрын
@@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.
@l0_0l45 4 жыл бұрын
If you are thinking pions, then depending of the charge of the pions, the decays will never violate C-Symmetry.
@l0_0l45 4 жыл бұрын
See the decay products on the Wikipedia page to resolve your query en.wikipedia.org/wiki/Pion
@paulmichaelfreedman8334 4 жыл бұрын
@@l0_0l45 It's not about the pion!
@ChayComas 4 жыл бұрын
I'm really thankful the @PBSSpacetime is still producing awesome content!!
@Loganopterix 4 жыл бұрын
Thanks for keeping up educating the masses
PBS Space Time
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