Deep Time: Crash Course Astronomy #45

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As we approach the end of Crash Course Astronomy, it’s time now to acknowledge that our Universe’s days are numbered. Stars will die out after a few trillion years, protons will decay and matter will dissolve after a thousand trillion trillion trillion years, black holes will evaporate after 10^92 years, and then all will be dark. But there is still hope that a new Universe will be born from it.
Check out the Crash Course Astronomy solar system poster here: store.dftba.com/products/crash...
If you want to learn more about the creation and death of the universe, watch Crash Course Big History here: • Big History
--
Chapters:
Introduction: The End of the Universe 00:00
Scientific Notation 1:34
The Five Ages of the Universe 2:20
The Primordial Era 2:52
The Stelliferous Era (You Are Here!) 3:05
The Degenerate Era 4:48
The Black Hole Era 7:42
The Dark Era 9:39
The Big Rip 10:20
Other Possibilities: Multiverses & The Cosmic Reboot 11:52
Review 14:10
--
PBS Digital Studios: / pbsdigitalstudios
Follow Phil on Twitter: / badastronomer
Want to find Crash Course elsewhere on the internet?
Facebook - / youtubecrashcourse
Twitter - / thecrashcourse
Tumblr - / thecrashcourse
Support CrashCourse on Patreon: / crashcourse
--
Hawking Radiation Mechanism resources:
en.wikipedia.org/wiki/Hawking...
math.ucr.edu/home/baez/physics...
casa.colorado.edu/~ajsh/hawk.html
physics.stackexchange.com/ques...
PHOTOS/VIDEOS
Hubble ACS SWEEPS Field hubblesite.org/gallery/album/s... [credit: NASA, ESA, W. Clarkson (Indiana University and UCLA), and K. Sahu (STScI)]
Flare www.nasa.gov/sites/default/fil... [credit: NASA's Goddard Space Flight Center/S. Wiessinger]
Hubble Views Stellar Genesis in the Southern Pinwheel hubblesite.org/newscenter/arch... [credit: NASA, ESA, and the Hubble Heritage Team (STScI/AURA)]
White Dwarf www.nasa.gov/multimedia/imageg... [credit: NASA, ESA, H. Bond (STScI) and M. Barstow (University of Leicester)]
Neutron Star Illustrated commons.wikimedia.org/wiki/Fi... [credit: NASA, Casey Reed - Penn State University]
Black Holes: Monsters in Space www.nasa.gov/mission_pages/nus... [credit: NASA/JPL-Caltech]
Binary Neutron Star Video nasaviz.gsfc.nasa.gov/vis/a03... [credit: NASA]
Giant Elliptical Galaxy NGC 1316 in Fornax Cluster www.eso.org/public/images/eso... [credit: ESO]
Proton Aurora svs.gsfc.nasa.gov/cgi-bin/deta... [credit: NASA/Goddard Space Flight Center Conceptual Image Lab]
A Race Round a Black Hole www.nasa.gov/centers/goddard/u... [credit: NASA/Dana Berry, SkyWorks Digital]
The Big Bang svs.gsfc.nasa.gov/cgi-bin/deta... [credit: NASA]
Hubble Ultra Deep Field 2014 hubblesite.org/newscenter/arch... [credit: NASA, ESA, H. Teplitz and M. Rafelski (IPAC/Caltech), A. Koekemoer (STScI), R. Windhorst (Arizona State University), and Z. Levay (STScI)]
Galaxy apod.nasa.gov/apod/ap150614.html [credit: Subaru Telescope (NAOJ), Hubble Space Telescope, Robert Gendler]
One star, many stars (M13) www.deepskycolors.com/archive/... [credit: Rogelio Bernal Andreo]
Earth www.nasa.gov/content/goddard/... [credit: NASA's Earth Observatory]
Explosion video [credit: Shutterstock / Richard Finch]

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28 июн 2024

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Комментарии : 3,8 тыс.

@StopChangingUsernamesYouTube 6 лет назад

I've always found it fascinating how we, creatures that currently live under a century on average, can look at theories about the eventual fate of the universe, time enough away to make the span of our entire species into a statistical blip, and feel existential dread and sorrow over drifting away from the rest of the universe, far past the likely end of all intelligent life that probably is and will be. We may be short-lived on such a scale, but our minds can feel out to the depths of eternity.

@-nazhifah 5 лет назад

this is warming to read somehow

@androkguz 5 лет назад

Beautifully written

@androkguz 4 года назад

@Rocknrolladube what a troll comment. Some systems are chaotic and others aren't. The weather tomorrow is hard to guess. The position of the stars in a millenia are not. The deep time predictions fall into the latter gruop

@rshiva08 4 года назад

@William Shreckengost: I love your comment. Hope you don't mind if I use it as a quote! With credits to you of course :)

@paullilly9645 4 года назад

@Rocknrolladube when youre dealing with trillions of units of time measurement the timing is more or less irrelevant. But the fact remains the same. We know it will rain in the future, tomorrow might be a good guess. But it IS an inevitability. Astronomical and celestial bodies, much less the universe, have no will want or need to conform to a manmade conception such as time. Look at it not as a literal timeframe, but as a roughed out general direction.

@americathegreat1811 5 лет назад

You know you are dealing with incomprehensible time scales when someone states, "I am not going to worry about factors of ten".

@maxmccormick3376 6 лет назад

I love how at this scale 10 trillion years is a "statistical fluctuation"

@handhdhd6522 4 года назад

No several 10s of thousands of years are...

@GLASSB182 6 лет назад

And after all those eons, the universe said, "let's have another one."

@VaughanMcAlley 5 лет назад

A new universe born from a cosmic typo.

@michiel7716 4 года назад

Aalwaays look on the briiight side of life....*whistles*

@Clockworkcityofpain 7 лет назад

"there's always hope" what a wonderful way to end a video about the end of everything

@Clockworkcityofpain 7 лет назад

Okay WhyNot actually, I've read that about that too. It's just slightly difficult to wrap our tiny humans brains around the idea of it. Or at least, it's kinda difficult for it

@Rattielicious 7 лет назад

nothing ends, nothing begins. Even with a start point of 'big bang' or any other we can figure, this is not a true start, it is a change/transformation. Its all about changes and cycles, nothing stops existing and nothing comes into existing, its only transformed )as far as we can currently figure). However, then we are left with lots of answers without any real answers lol as we are then stuck with WHY does anything exist at all. I theorize this is why god/gods were invented and in a way they are correct (as in it might be correct to attribute existence to an unknowable force) but to make it more understandable/easier to relate (and other motives), this force/forces were personified and given various names (same as for the unknown elements that became gods etc).This invented an answer to 'why' that kept most people happy....for a while...then the understanding of 'how' grew with new world views and the question of 'WHY' seems even more perplexing lol. Achieved a lot without achieving anything, we still do not know why! haha let alone any way to know a true start point (assuming there is one). Almost like trying to find the corner of a circle :P

@bananian 7 лет назад

Everything that has a beginning has an end.

@bopyourhead9584 7 лет назад

Missy West; I have had similar thoughts, there is only form and structure, it is the changing of form that gives the illusion of time. I don't really believe there is a beginning or end just infinite change.

@lordpinochetuttp3819 6 лет назад

+bananian Which means that an end has an end, considering that an end has a beginning and so on?

@theaboutroundand 7 лет назад

on the bright side, even at a modest rate of interest, just imagine the value of your investments in 10^92 years

@hiphiphorhayy 7 лет назад

theaboutroundand that happened to fry in futurama except he didnt wait that long lol

@group2gaming 7 лет назад

just imagine the US debt

@jakethespaceman9896 7 лет назад

its like 10^10^90 according to Wolfram Alpha

@Broockle 7 лет назад

Chances are the currency you used will completely deflate as it has been rendered worthless by the introduction of new currency printed by the Diddy Kong Dynasty after the 32 usurpation of the man kind by an alien nation. Then a few billion alien take overs later all sentient life was extinguished by the natural decay of the universe and you finally arrive in the year 10^92 in your time machine to find the protons and neutrons that formed your bank have completely decayed and are impossible to reassemble. Sad to say your plan needs tweaking.

@INMATE2468 7 лет назад

Josias Alexis he was joking about the joke

@illiteratethug3305 4 года назад

This makes me nostalgic for a simpler time when I would watch a documentary on the Heat Death of the Universe for my hit of bleak, morose existentialism, as opposed to now, when I just watch the News

@landovcomedy 4 года назад

illiterate thug , damn this comment age horribly huh :/

@garrtrigger 5 лет назад

The repeating cycle of big bang is easier to take in, it gave me a sense of relief.

@ElenaSemanova 7 лет назад

I absolutely and utterily adore his positivity and passion. It's just really beautiful to see someone doing what they really love to do in their life.

@eastofeden9487 6 лет назад

Yeah I wish he would tone down the affect a little tho

@EugeneKhutoryansky 8 лет назад

Enjoy the Universe while it lasts.

@bikingdervish 6 лет назад

Enjoy this century, because most likely you won’t live past it.

@haydenblankenship9760 5 лет назад

Mr.Phil, I just want to thank you for your passion of sharing your knowledge on the amazing universe that we live in. With this video I have watched the entire Astronomy course and must say that is has been a joy to be exploring the known and unknown with you these past few weeks. You have given me a desire to watch and study the night sky myself and to share that breath-taking experience with my friends and family. Thanks to you again, and everyone at crash course for this great series.

@jessykaros 7 лет назад

thank you for teaching me about space and time without making me depressed at the end. Not very many people can do that. Subscribed.

@DavidPhilipNorris 8 лет назад

This brings to mind Isaac Asimov's short story, "The Last Question," about an artifical intelligence that endures long after the heat death of the universe, continually collecting data until there is no more data and no one to report to, culminating in the last line of the story when it ultimately declares "LET THERE BE LIGHT," bringing about the rebirth of the universe. It's a beautiful and hopeful piece of science fiction.

@frankschneider6156 8 лет назад

+David Philip Norris Excellent story, love it.

@TheVanillaChapstick 8 лет назад

+David Philip Norris Damn, now you've ruined it for me.

@DavidPhilipNorris 8 лет назад

Don't worry, the actual story is much better than my summary.

@StevenEveral 8 лет назад

+David Philip Norris The whole of the story is still really awesome, even if you already know the ending.

@cuckoophendula8211 8 лет назад

Oh my gosh, I'm unaware of such a story and even after just reading 2 lines of your summary I was thinking...does this AI become GOD???

@obiejetochukwu8145 8 лет назад

This dude just explained scientific notation in 15 seconds better than all my middle school teachers put together

@DuckrollProductions 7 лет назад

Here let me explain it even faster 10^x is a 1 with x 0's after it 10^42 is a 1 with 42 0's

@elijahpedroza9347 7 лет назад

It's not that hard to understand 😂😂😂

@rumbledowndesigns 6 лет назад

predacon95 shame on you for being ignorant. Ever consider that his teacher was just really bad at his/her job?

@jaybabcock9123 6 лет назад

OBIEJE TOCHUKWU same

@ColinJMonge 6 лет назад

OBIEJE TOCHUKWU same bro

@winterspectre 4 года назад

This makes me feel oddly. at peace with the universe. The eventual end of everything is comforting.

@blockhead134 4 года назад

I wouldnt say "comforting" personally. Its another reason that life is just pointless struggle and pain.

@novamg9507 5 лет назад

First positive take on Vaccuum Decay that I’ve heard.

@Axodus 4 года назад

Yeah, he forgot to mention that Vacuum Decay can occur even in our own time.

@tomlukin7030 7 лет назад

*reinstalling universal system 32* >rebooting physics< >Creating matter< >___________< >Reboot complete

@vikas-ln3zc 5 лет назад

Error 404

@Kofla2000 4 года назад

Please insert disk 9.983.234.365.723, press any key to continue

@jrhermosura4600 4 года назад

Why isn't this the top comment

@bethanyboarder7751 4 года назад

oop looks like some data got misplaced

@NickiRusin 8 лет назад

This makes me incredibly distressed. It's relatively easy to accept that my existence will end at some point, I can cope with the existence of humanity ending, but the perishing of existence itself - that's the line for me. It just makes humans seem so meaningless.

@may5802 8 лет назад

+Nick Nirus We are meaningless. Humans can do amazing things, we build, develop and learn all kinds of things, but in the end it doesn't really matter. I do understand that this is kinda harsh and hopeless, but we as a species are part of life. Even life itself might be useless in the end, but that doesn't make it less mind-blowingly wonderful. We exist and we get to be part of something bigger. Isn't that all we could ever hope for?

@rooksed 8 лет назад

if you really believe that then you might be as naive as the scientist themselves... they cant even explain how the big bang occurred, how are they going to explain the end of the universe?

@whiteflagstoo 8 лет назад

+Nick Nirus I don't think of it as existence being purged. More like, no more changes. Whatever is left in the dark era - really basic particles - will still be there.

@cherrypickers404 8 лет назад

+Rook Benavides Logical inferences. That's not to say that they're actually right, though you speak of them as if they're shooting in the dark with ear plugs and blind folds on.

@NickiRusin 8 лет назад

Annemay Schaap That is really harsh, but you're right. It's probably this meaninglessness that makes me so sad.

@thevoidlookspretty7079 4 года назад

This all just made me think: “That is not dead which can forever lie, and with strange aeons, even death may die.”

@pantbd 4 года назад

"Different, It'll look really different" - The most literal phrase in the whole video

@X-3K 8 лет назад

I feel that us talking about the end of the universe suggests the end of Crash Course Astronomy in the near future :'( Oh well, time to make way for Crash Course Physics!

@HireDeLune 8 лет назад

+Sebastian Carrier "As we approach the end of Crash Course Astronomy" noooooooooooooo

@pyonpyon9394 8 лет назад

yesss pleaseeee cc physics would be amazing

@toddgreener 8 лет назад

+Sebastian Carrier Have you checked out PBS Space Time? If you like this show you'll probably love that.

@westafricangooner9819 8 лет назад

Check out +physics videos by Eugene khutoryansky

@tron-8140 8 лет назад

+Sebastian Carrier Nnnnnnnooooooooooooooooooo *dies*

@MagnaOmerta 7 лет назад

My nihilism's back.

@NearVSMello 7 лет назад

Try turning it into existentialism.

@FireShell7 7 лет назад

try turning it into absurdism

@dumpsockpuppet5619 7 лет назад

Otherized Meme try absurding it into turns

@cmattbacon7838 7 лет назад

Just forget about it and hug your mom

@EmbraceTheThunder 7 лет назад

Good. Now you can start creating your own values.

@ltdan215285 4 года назад

"so low energy, it might as well not exist." talking bout me??

@MadTimmy 4 года назад

If we survive until the heat death of the universe, we’ll be so technologically advanced that we’ll probably just create a new universe. With black jack and hookers.

@SinisterSi718113 7 лет назад

who else loves existential crises

@terry2788 7 лет назад

Simon F. I do! I even spent an entire night thinking about it and not going to sleep :D

@rileyodoherty8535 6 лет назад

*Nihilistic crises

@NumeMoon 6 лет назад

It's not a crisis if you still love it.

@yeahoh2222 6 лет назад

faalkaa meee

@BeanSprouts02 6 лет назад

IS DIANA YOUR PROFILE PICTURE GIRL?

@falnica 8 лет назад

"All of this has happened before and will happen again" you Cylon

@crashcourse 8 лет назад

+Fernando Franco Félix YOU'LL NEVER KNOW FOR SURE! -Nicole

@paillettecnc 8 лет назад

+Fernando Franco Félix It's actually something colonial, quoted from their scriptures.

@philferrara5990 8 лет назад

+Fernando Franco Félix That made me grin. Love BSG.

@DeadpoolAndFriends 8 лет назад

+Fernando Franco Félix Frakin' Toasters!

@badastronomy 8 лет назад

+Fernando Franco Félix So say we all.

@liangliangxu7061 4 года назад

"The Big RIP" will literally be the big rip.

@zamane1234 4 года назад

EasyOrangeGaming Yup.

@ashleycantrell9844 5 лет назад

*time keeps on slippin, slippin, slippin, into the future~...fly like an eagle...*

@brianjardine9184 4 года назад

I noticed that and heard that song immediately now I'm about to watch Space Jam

@smooblox69420 4 года назад

Home sales for people that have to sell her on foreclosures that’s when

@williammorton8555 4 года назад

Dout doooo doo dout

@AjourChannel 7 лет назад

"One day, the Flames will fade and only darkness will remain. Even now… there are only embers - and man sees not light, but only endless Nights."

@nymphrodellsalavin 6 лет назад

Aureo where is that from?

@osurpless 6 лет назад

Nectovelius Salavin Dark Souls III, I believe.

@jacobhilker7722 5 лет назад

Oliver Surpless it was the first Dark Souls

@FirstLast-ll8zq 5 лет назад

“Indeed, this is your fate....”

@budmeister 5 лет назад

@@bigtutubi6731 It's from a game

@s.n2445 7 лет назад

Science never, I repeat, NEVER, fails to amaze me. Mind=Blown

@colmhain 5 лет назад

"I wanna fly like an eagle, to the sea. Fly like an eagle, let my spirit carry me."

@neomonk5668 5 лет назад

So you’re saying I’ve got some time to finish my projects.

@kennethmitchell1960 7 лет назад

dark times ahead, folks

@jmitterii2 7 лет назад

Good news everybody! You won't notice any of it, you'll be dead.

@thehorseformerlywithoutana2522 6 лет назад

Just light a candle. Problem solved.

@MildWilliam 6 лет назад

Quite far ahead, fortunately.

@anuragkolla8295 6 лет назад

Kenneth Mitchell I did not have to do this app for my kids to play with my friends on my way and out and the game other day I was going

@alaaye5237 4 года назад

Don’t worry, we’ll all be dead by the time it happens.

@LordTetsuoShima 7 лет назад

9:46 subatomic particles, photons, and Jeb Bush*

@XrandommonX 6 лет назад

If only we could harness that energy.

@tikkidaddy 5 лет назад

Hillary Clinton's Teflon....

@rventra85 5 лет назад

lol best comment

@Incred_Canemian 5 лет назад

The only way to harness Jeb Bush's energy is to clap

@carsonblake107 4 года назад

I like how the subject matter here is so Grimm, that vacuum decay is a happy thing.

@zachthom2998 5 лет назад

It's always nice to hear a human warp up a talk about deep time with a positive message. Keep going guys we're all in this together!

@MrGregory777 8 лет назад

Will the Toclafane be there?

@garethdean6382 8 лет назад

+MrGbere777 They die out after a few trillion trillion years. After that we enter the Blue Box era.

@AlDuke14 8 лет назад

But the Queen of the United Kingdom will still be around

@enderstar5017 7 лет назад

*Me watching this video with subtitles* "In 1040 or so years from now, even degenerate stars will be gone." Me: WAIT, WHAAAAAAAAAAAAAAAAAAT?!?!?!?!?!? (Realizes that he's talking about 10 to the 40th power, not 1,040) ...oh

@bbbabrock 7 лет назад

EnderStar501 Those two aren't quite the same thing.

@ScareSans 5 лет назад

@Paul Babcock that's what they're saying...

@isbestlizard 4 года назад

I want to have my mind uploaded and ejected out of the galaxy and woken up every few thousand years for a tiny increment of time so I can watch the Milky Way and Andromeda merge 💚 that'll be a sweet sight for a clone of me to see!

@b.lonewolf417 5 лет назад

"Eat more tacos and burritos, so we can have more gas for star formation. (This video has been sponsored by Taco Bell...)"

@RustyShackelford6 4 года назад

Fart fart

@adamoleeee 8 лет назад

Phil, Thank you so much, I read this book in 2000 and lost my copy, I have been struggling to recall the title for many many years. cannot express my gratitude enough. one of the most elegant and rewarding books of its type.

@yomammasaurusrex9571 8 лет назад

So.... if space is expanding like you said in a previous episode, can time be expanding in that same exact way? We just perceive it as time passing?

@marzk4234 8 лет назад

You just blew my mind

@davidkim4653 8 лет назад

+Yomammasaurus Rex You can't exactly call it expanding because time is relative. Time is not going at the same rate for one observer compared to another observer in a different frame of reference. So you really can't make a comparison on how time is "expanding" for all observers in the universe. When two observers are moving relative to each other, they are in different frames of reference. And all of the universe is moving relative to something.

@PajamaMan44 8 лет назад

+David Kim But isn't the expansion of space also relative? Depending on how far you are from something else, space is expanding faster or slower, much like how time moves faster or slower depending on how fast something it moving relative to you. Nonetheless, it is pretty obvious our universe simply resides in the event horizon of some 4-dimensional black hole

@t3st1221 8 лет назад

+Yomammasaurus Rex Time is only experienced if you have mass. A photon being massless is literally frozen in time and from it's point of view its life last 0s. So by the dark era, when there is only light left, time is a meaningless concept as there is nothing to experience it.

@Demogarose 8 лет назад

+Yomammasaurus Rex No, because Time isn't actually a real thing. "time" as we call it is an expression of our perception of change. When we talk about time, what we are really talking about is the changes in the universe around us that have occurred.

@am.is.aesthetic.7870 6 лет назад

Lately I've been watching these videos when I get bored but this just scares me but also makes me relieved that they're might be hope for a new universe.

@MultiTrollNation 5 лет назад

The Restaurant At The End of The Universe. A Hitchhiker’s Guide To The Galaxy reference. Immediate respect and immediate like 🤟🏻👍🏻

@brianjardine9184 4 года назад

Also a space jam reference

@Neceros 8 лет назад

I don't understand why people internalize the end of the universe. I've seen people do it and get very depressed. We will be long dead before then, and what's more, most likely something else will happen. We will learn new rules we didn't understand, or something about the universe may change merely by process of time and observation. We simply don't know, and none of us will ever see it.

@magicguycouldbe 8 лет назад

+Neceros The reason people freak out is bc nihilism

@NickiRusin 8 лет назад

+Neceros I internalize it every time it comes up, which in my case is really often, since I love astronomy and learning about it a lot. I don't really know why I'm doing it, since it is really the most depressing thing imaginable. It may or may not have changed me as a person, actually.

@rezza6 8 лет назад

+Nick Nirus You don't find the fact your life will be ending within this century more depressing? Compared to you, the universe gets it pretty good I'd say.

@NickiRusin 8 лет назад

rezza6 Hey, that's not necessarily true. I may live to see cybernetic organs and even human-to-machine transplantation, but that's not the point. I might get to do something meaningful in my lifespan, but ultimately the greatest of deeds will be lost to time. I guess that's what makes me so sad.

@TheLoneBit 8 лет назад

+Neceros Unlike everyone else (and this could be due to my lack of knowledge in the subject) have a hope that there is some why that we don't know about yet to escape the death of the universe. Maybe we can find a new home.. maybe we can make a new home.. maybe we can break the rules and keep our atoms from decaying.. We don't know yet.. Death, to me, is pointless. And I can not accept death.. I can not accept pointlessness. Everyone else has already accepted it though.. which is kind of sad to me.. so "life itself" as it is now, is my trigger.

@guyclykos 8 лет назад

Has anyone here heard about the theory that the universe is just one giant computer simulation? The end of the universe may come when it's forced to update to Windows 10.

@jayjung5234 8 лет назад

lol

@seriousbutfunny2 7 лет назад

Haha!

@nickolasbrown3342 7 лет назад

Assuming intelligent civilization has the capacity to live far into the future with technology continuing to progress, AND has a willingness to create an "ancestor simulation", it is statistically more likely that we live in a simulation, than live in reality.

@rumbledowndesigns 6 лет назад

Nickolas Brown your argument is flawed. At present day, we have the power to run a relatively small scale simulation such as the one supported in the theory, just with lesser variables. What's to say the people in those simulation don't have "feelings" either? Maybe we ourselves are part of a sim created by a higher level society. Saying it is statistically improbable is redundant because if it is true, then what "statistically improbable" means is futile to define.

@NumeMoon 6 лет назад

Technically I think that would be just a regular upgrade, so no information lost.

@brandonmtb3767 4 года назад

Then we find out our universe is just a particle in a giant megaverse

@Kleaz80 4 года назад

PinHead Larry If my brain wasn’t fried before this comment, it definitely is now!

@niko-ni6ps 4 года назад

@Something Mildly Homophobic me too. I love to read and watch kaku and several other scientist talk about multiverse and string theory

@brandong.1857 4 года назад

Thanks for making this subject accessible and easy to understand. Fascinating

@AnhLe-zl4ws 8 лет назад

well by the time any of this happens, humans will be gone. It seems so bleak in the "future" but if I think about it, as a human, it is difficult to even comprehend infinity itself because I have a finite lifespan. The universe restarting over and over in a cycle sounds plausible and if the laws of physics get rewritten, who knows what will happen?

@MrZvastica 8 лет назад

+Anh Le No, the universe restarting over and over in a cycle sounds like religion. Where from fear of ending people create scenarios filled with hope.

@writershard5065 8 лет назад

+Anh Le Well we could either be gone, or we could have further evolved into something else, and grown our civilization to the point of which we have empire across galaxies.

@DragoniteSpam 8 лет назад

+MrZvastica You could either call it that, or something more like a weird science fiction setting. Which are a bit more fun to think about imo.

@cpob2013 8 лет назад

+MrZvastica well, it might. some other universe might bump into ours or something. black holes are still a mystery and other warping effects. infinity is a long time. lots of time for unknown possibilities to have a chance. but does it really even matter? once stars all go out, certainly when brown dwarfs go out, were toast.

@Andytlp 8 лет назад

+MrZvastica religion is dumb but universe that only happens once sounds ridiculous.

@devling6606 7 лет назад

“The Wheel of Time turns, and Ages come and pass, leaving memories that become legend. Legend fades to myth, and even myth is long forgotten when the Age that gave it birth comes again.”

@jari2018 6 лет назад

Quoting Robert Jordan. Anyway Ian Banks Hydrogen Sonata is more true than this video. Civilations sublime when they mature so maybe we have a century before the event or less.

@IKill1FeeDZz 5 лет назад

So when he mentions a cosmic reboot, that’s basically another Big Bang

@therealpunitdh 6 лет назад

Love your videos man. Please keep them coming!

@EdWalzak 8 лет назад

Killer Steve Miller reference! Please don't end, this series has been amazing.

@O_Ryodan 8 лет назад

There is no words to express how much i like this channel!!!

@Allenryan819 4 года назад

Nothing last forever!

@sagnikmaity1444 5 лет назад

I like how you find hope in the darkest time ever... You are so positive sir

@FireShell7 7 лет назад

This just makes me feel nihilistic - I'm gonna live for a little over 100 years at maximum...

@96ace96 7 лет назад

Otherized Meme Ahh... don't give up hope just yet. I'm gunning for 20 000+. At least. Let's meet each other at Alpha Centauri 900 uears from now, yeah?

@jmitterii2 7 лет назад

96ace96, now that's just delusional.

@AB-ee5tb 6 лет назад

Otherized Meme you won't live till 100 bud

@ThorHC11 4 года назад

@@jmitterii2 It's not delusional, it's a JOKE.

@no-ge9gd 8 лет назад

yessss my adiction continues

@Fermion. 4 года назад

So a team of physicists figured out when my wife will finally be done getting ready. The Dark Era. Gotcha.

@absolutelysobeast 4 года назад

Fermion ha! Got eeeem!! But also you should consider yourself lucky that your wife takes so much time to try to look her best for you! Just play some video games while you wait that way when it comes up, you can tell her that you hate waiting for her as much as she hates you playing video games, problem solved!

@mdtalhaansari1096 5 лет назад

I love the recap part. Maybe the only show on RU-vid to recap the important points in the end. Thanks

@nutmaster652 7 лет назад

"I'm going to use numbers bigger than any other numbers you've come across before" Fuckin bring it scrub, Sharkee prepared me for this. Show me Graham's # noob.

@brendanotoole5871 7 лет назад

Hyper iterations for days

@dumpsockpuppet5619 7 лет назад

Tommy Klein pfff i just came from a Vsauce video, i think i can conceptualize some damn big numbers

@Dunkair 7 лет назад

Easy. For any number you choose, I will choose that number + 1. Thus, my number will be bigger than any you can conceptualize.

@roninmediaoutlet 8 лет назад

Hey there, I've watched huge portions of your courses and the World History and Astronomy are my favorites by far. Just wanted to say I think what you guys are doing is revolutionary, and I'm really glad PBS picked you up. You and Mr Green both remind me of the few good teachers had over the years - the ones who inspired. Keep up the amazing work; you are reaching an audience the size of which is unreal and making learning fun again.

@justbreathe7816 5 лет назад

I just love the Hitch Hikers Guide to the Galaxy reference.

@EasyExplained 5 лет назад

man, you are one of the best explainers ever!

@NefosG 7 лет назад

Funny thing about exponentials is, let's say after 10^90 years, if you wonder about the living beings of that time that could be living by harvesting energy from black holes and think that they're living so close to the death of the Universe, if the super massive black holes are really going to run till 10^92 years, leading to the impossibility of life by the lack of energy, that means the Universe is still 1/100 of the way there. It's like saying a 1 year old baby is so close to his estimated death of about 100 years. Just to show how absurdly big that number is.

@wd-type9643 6 лет назад

Nefos thanks doctor Wiley

@EveryNightAtNine 8 лет назад

Time keeps on slipin...slipin...slipin...into the future. I want to fly like an eagle...

@REDPotriats757 5 лет назад

Adam Lang 😅

@sup2069 5 лет назад

That song popped into my head when he said that too! 😆

@almcdonald8676 7 лет назад

Isaac Arthur has an excellent science and futurism channel in which discusses deep time and black hole farming in addition to Fermi paradox and dyson dilemma solutions. The guy is a genius.

@monideepabhowmick5879 5 лет назад

Great job in making me understand such profound ideas in such a simple manner.

@whoaminow100 7 лет назад

i think i'll contain my worries to things that will likely happen in the next 10,000,000,000 years and not so far in the future as to be ridiculous.

@dorianhemming8339 8 лет назад

ugh, I'm really going to miss this crash course

@Galistarwater 6 лет назад

Wow...and I thought the immense size of the visible universe was overwhelming. But this...wow! You completely blew my mind! :D Awesome video, by the way! Thank you!

@manley0702 4 года назад

"Protons eventually decay" - This is the first source I've come across that seems to be confident of that hypothesis. Are we sure about this?

@goldrussh 4 года назад

No, that's just what current thinking is right now. It could very well change completely within the next hundred years, even next year, or tomorrow.

@VanquishR 4 года назад

If protons do not decay, the universe will just keep matter strewn about at impossibly long distances for them to ever encounter other matter. We really don't know yet.

@pentakadi 4 года назад

It's real according to physics..Every element has a half life...Just Google it..

@garethdean6382 8 лет назад

Phil: There's a light at the end of the tunnel... Phil: ...and it's an oncoming train.

@MpowerdAPE 8 лет назад

Call me a degenerate but, I loved this.

@garethdean6382 8 лет назад

+MpowerdAPE That's dark man.

@classactionsteve 8 лет назад

+Gareth Dean that's stelliferous, stupid!

@garethdean6382 8 лет назад

Steven Levine I'm not stupid, just low mass.

@RT-oy7mu 8 лет назад

To me this is freaky awesome.

@jasonburge 8 лет назад

Hey you are not a degenerate! you are stelliferous!

@ideath173 5 лет назад

mind melting. Soul crushing.

@vexacron 5 лет назад

This show is so awesome.

@BetaFett 7 лет назад

This is my favourite crash course. More than physics, more, even, than gaming. :)

@ethanwild3301 7 лет назад

Time keeps slipping into the future 💯

@amef15 6 лет назад

I wish you had included Roger Penrose's cyclic universe theory into this video. That theory is so far beyond, it makes my mind explode every time I think about it.

@abesouth3805 6 лет назад

It would be good if Phil would do yearly updates to this course. I wouldn't care if they were an hour long or even longer

@ajaykumarsingh702 7 лет назад

This video is amazing and very educational for beginners.

@traxhoho 8 лет назад

Just yesterday i was losing sleep by thinking about the end of the universe :I

@pyonpyon9394 8 лет назад

I feel you , that happens to me a lot 😐

@zhcore2670 8 лет назад

+Cesar Gonzalez Same.

@PaversPaveToThePave 8 лет назад

I don't know if this gives you any solace, but it'll be exactly like before you were born.

@zhcore2670 8 лет назад

+Luke Sanders woah...mind blown

@PaversPaveToThePave 8 лет назад

+K_ Life Hope that helped.

@drdzdd 5 лет назад

Great talk Sounds like poetry to my ears

@sriharsha5036 5 лет назад

One of the greatest narrations of timeline of the universe

@DuranmanX 8 лет назад

I'm glad to be living in this time

@raydenstriver5451 8 лет назад

i think the description is wrong, it says "black holes will evaporate after 1092 years"

@crashcourse 8 лет назад

+Rayden “Jay” Striver Yeah, that was meant to be 10^92 years! It's fixed now! -Nicole

@bt4670 8 лет назад

+Cycling in Edmonton from the Eyes of a Teen Here's your no-prize

@NoahTopper 8 лет назад

+CrashCourse Eh, sounds close enough.

@wolfumz 8 лет назад

+Cycling in Edmonton from the Eyes of a Teen it's only a difference of 92 zeroes

@marcperez2598 8 лет назад

10 up 92 means 10 to the 92nd power

@jimmyshrimbe9361 5 лет назад

This show is amazing!

@williamrichardpabstcathey3644 4 года назад

Thank you. Very enlightening!

@TimD.Morand 7 лет назад

"Fly Like An Eagle" from Steve Miller Band. Well placed reference!

@thomassophocles6757 7 лет назад

Will the subatomic particles b as "low energy" as Jeb?

@JaySkottTV 5 лет назад

big tutubi Damn, 3edgy5me over here with the super sick burn on a comment from 2 years ago.

@Teo117 Год назад

Super interesting!! Thank you 😁

@danchisholm1 6 лет назад

Awesome. Such a fun video. Ty guys.

@AnteUjcic 5 лет назад

11:18 um wouldnt that create another big bang thus going in circles

@JoelCarli 7 лет назад

I believe Carl Sagan said that Hinduism is the closest a major religion gets to modern cosmology due to the time scale of a Brahma day (that is, one day from the creator deity's pov) being equal to the projected time scale of the universe's existence. Hindus believe in cyclical time, meaning that the universe is constantly being destroyed and recreated, which seems to fall in line with the theory posited at the end of this video about a universal reboot. Interesting stuff.

@aishanipal8109 7 лет назад

John Baterino and this is your concept (:

@LightswrathUltimatum 6 лет назад

Religion succs.

@lunaticfae4415 6 лет назад

John Baterino lmao, you see what you did here right?

@nm9864 6 лет назад

Omg ... Please do not bring blind religion in here.

@eshwar2496 6 лет назад

I am a Hindu and I believe what God and Vedas say and the concept is true according to carl sagan but not according to Vedas. Nobody knows what is in the Vedas. We can also reveal the grandest mysteries of Jupiter, or say for example whether the aliens exist or not or lot of other hard astronomical questions, but none, none in the universe can say what is in the Vedas. I request you to not to believe such kind of things. I too believed in such things. My mom said to stop to believe such things because of they may be fake. But when I came to know about the real astronomy, I immediately stopped believing what the fake stuff all are talking about. Of course, one Brahma day is equal to the life cycle of our universe. But other things like the avatar (incarnation, or rebirth of the same soul) of Kalki will take place at the end of Kali-yuga. They may be true, but it is said that Kalki will be born to Vishnuyasha and sumati which are all fake because nobody knows who, to which they should be born, which is fake.