Black Holes: The Hungriest Things in the Universe | Compilation

[@bletz421]

We must be by a black hole hank keeps getting younger and then older in this video its amazing

[@onemoreguyonline7878]

You sure that's not his brother? Hahah

[@austinkissling9036]

Got even weirder when he lost his hair, grew a beard and changed his name to reed

[@GulfportOG]

I didn't even notice that. I'm still amazed with how he's able to film in space without a suit 🤯

[@traveler804]

lmao

[@kentpomares-music728]

That was a funny comment but then after reading it a second time I realized the physics of it are wrong. for the effects of time dilation to be so noticeable as to make Frank look physically younger would require that this effect apply to one of you more than the other. In other words you would have to significantly increase the distance between the two observers. This effect is really significant enough that if not accounted for, our GPS and satellite tech would be constantly off track and unreliable. The atomic clocks both up there at on the ground are constantly being adjusted to make sure they match. Think of it like daylight savings except that you’re either always gaining time or losing it relatively speaking based on your distance from the other person making the measurement. Yeah I’m thinking about interstellar now too!

[@d33pNacho]

It's funny how they talk about surviving stuff happening millions of years from now when I'd be surprised if our species doesn't destroy itself in the next few centuries.

[@shanehebert3237]

A SciShow black hole compilation is one video you just cant escape from.

[@bloomsux69]

This needs more likes

[@kentpomares-music728]

Hahaha cute! These are the kinds of Jokes my father made when he was alive

[@kentpomares-music728]

He was a good man oh in his heart. He struggled with great anxiety and a pretty bad case of bipolar while he was alive and so the poor guy really had some weight on his shoulders. I focus on the positives he brought to my life and family. He had an incredible work ethic, loved to look at culture and how to self cultivate. He was a man of countless mediocre jokes but incredible laughs. One of the easiest laughs in the world perhaps this man had. Patrick was his name. He died of brain cancer in 2010. Apparently he slipped away unconscious in his sleep with what I believe would’ve been a morphine drip for the pain. That’s how I would like to die. That piece will kind of end because we made up before he passed. You never know when death‘s toll will toll for you so I assume truly the last time you say goodbye to a loved one or good night to a loved one, say it as though you may never see them again. In this life at least. Before pressing submit I cannot deal with the dissonance in the epigram I just used about death tolling for you! ;) apparently the only bells associated with death that would ring would be for dead ringers. People who were buried around 170 years ago on this continent of North America. These people were assumed dead but then wake up in coffins with a small string attached to a branch with a bell on it leading all the way down to the coffin. If it tolled for you, then what you’re actually doing is looking for somebody who is still alive but was presumed dead and was erroneously buried. See the conflict? Lol

[@BengalBoy16]

25:45 This is the first time I have EVER heard it called "Milkomeda". I have always heard it to be called, "Milkdromeda".

[@melchezediek]

Yeah that messed with me when he said that, like literally never heard "Milkomeda," which doesn't really make sense anyway. Milkdromeda not only makes more sense given the names of the colliding galaxies, it also sounds way better.

[@SlashRfnR]

Hank: let's clear a few misconceptions. also Hank: things get too close and get "sucked" in.

[@singletona082]

well if you get too close to the earth you'll get sucked in.

[@Amlaeuxrai]

@@singletona082 Who is this "earth" you are talking about? I should pay her a visit... *badum tss*

[@solsystem1342]

@@singletona082 What they mean is that unless your orbital trajectory actually leads inside the black hole you won't enter it. Even if you fall towards a black hole and just missed the even horizon you'd just continue orbiting it. While a path with less tangential velocity could fall in even from further away. This is techniquely not true for the earth because passing through the atmosphere around the earth slows spacecraft eventually causing them to fall back to earth (the ISS feels drag this way for example which is the main reason we need to send it fuel regularly). tldr: rocket science is complicated who would have guessed. The main point though is that there's not a set distance at which you get "sucked in" rather you have to give up enough energy to have your path intersect the surface (only true when orbiting but I can't be bothered to explain the subtleties). For a human understandable example think of a coin on one of those funnel donation things won't enter the hole until it's lost most of it's angular momentum due to friction with the wall to fall off the wall. Whether that's a straight shot into the hole or, a long spiral as it slowly makes it's way down. (Just to clarify in space the object slow down unless it's passing through an atmosphere or hitting something else it'll just keep following the same orbit forever.

[@joyl7842]

Quite typical of Americans to use poor terminology. I couldn't tell you how many times I've been annoyed by some American saying "the human race".

[@semaj_5022]

Yeahh the writer dropped the ball on that one. Things can *fall* in if they end up inside the ISCO of a black hole, but not sucked in. They're not vacuums. Shame shame

[@ColeDedhand]

If we're only 93,000,000 miles from Sagittarius A* then I think we actually should be VERY worried.

[@thhseeking]

I was thinking the same :P

[@LordLOC]

As long as we are in a stable orbit around it, it's nothing to worry about. I mean other than not having a sun etc lol

[@optodata]

Yeah. That distance is only off by a factor of 2 billion or so. 1 AU vs. 1.65 billion AU or 0.000016 light year vs. 26,000 light years

[@LordLOC]

@@optodata Well the distance is off, but in the end a black hole isn't some monster that just eats everything (well it does but it's like any other object with gravity) since you have to be close enough to fall in for it to be "bad" as it were :P

[@walkingmanhisdogtakingvide3901]

For once I'm thankful we're not on the metric system. Just think how much closer we'd be versus miles.

[@TheRogueWolf]

"The gravitation pull of a person standing thirty feet away from you is ten thousand times stronger than the gravitational pull of our galaxy's distant supermassive black hole." Especially if that person is Scorpion. "GET OVER HERE!"

[@kindlin]

0:23 The Black Hole at The Center of Our Galaxy: Don't Panic! 4:30 The Kugelblitz: A Black Hole Made of Light 8:25 3 Ridiculously Extreme Black Holes 14:07 There's A Birth Control For Stars 19:36 How Long Can Humans Outrun Extinction?

[@beepboop204]

bless u

[@blackoak4978]

In the first segment Hank makes it sound like the Roche limit around a black hole is it's event horizon... that's insane! The event horizon is the point at which all paths of everything, including light, leads inwards towards the singularity. A planetary mass couldn't survive tidal forces of a black hole anywhere NEAR the event horizon

[@qzbnyv]

I don’t understand what’s going on. Have Sci-Show Space videos always been this inaccurate and filled with cases of them falling victim to common misconceptions and I’ve just never noticed? I thought they had researchers working on the scientific accuracy of these scripts.

[@rogerszmodis]

The biggest supermassive black holes are so spatially huge you could cross the event horizon and fall for a while before tidal forces become extreme. At least according to relativity alone.

[@dwaynowilli6822]

@@qzbnyv its a compliation of old clips. They should have made the corrections though.

[@skibaa1]

3:43 How tidal forces are related to crossing the event horizon? For very big black holes, the event horizon has so little curvature, that tidal forces are negligible and for small BH the spaghettification can be big much before reaching the event horizon

[@BoDiddly]

Uh Hank...did I just notice two mistakes in that first video that I didn't notice before? 1) There are three classes of Black Holes, not Two; Stellar Mass, Intermediate Mass and Super Massive 2) The Earth is no 93 million miles from the Super Massive Black Hole at the center of our Galaxy, it is about 26 thousand Light-Years away.

[@theveryaveragegamer9865]

Also the event horizon is not the point of spegetification.

[@Tomomoto9000]

Also Ton 618 is the biggest known blackhole at 66 billion x the mass of the sun.

[@theveryaveragegamer9865]

And the galaxy doesn't orbit Sagittarius A*. I was very disappointed in the accuracy of this video.

[@4rkain3]

93,000,000 mi is the distance between the Sun and Earth. Someone goofed.

[@philw5699]

The galaxy doesn't orbit Sagittarius A*, it makes up less than a percent of a percent of the mass of the galaxy. Sphaggetification doesn't happen at the event horizon. For a small black hole it happens way before the event horizon, and for a supermassive black hole it would happen deep inside the horizon.

[@TK199999]

Yes, the galaxy doesn't orbit around El Monstro. It orbits around the central mass at the center of galaxy. With the Dark Matter reefs that surround the central mass and the rest of galaxy controlling how it behaves.

[@MrEnjoivolcom1]

I can always tell, like myself, those who watch all the bh videos on KZbin there is to offer, lol. They're just my absolute favorite, astronomically speaking.

[@philw5699]

@@MrEnjoivolcom1 When it comes to black holes, my favorite videos are: -" What would we see if we fell into a Black Hole? " By Science Clic Eglish. That one covers what general relativity says would happen, and also my favorite channel on youtube for general physics topics. -" Mapping the Multiverse " by PBS spacetime which explores the weird and whacky world of spinning black holes, and what the Penrose diagram says would happen if you fell into it.

[@chrishartley4553]

2:12 93 million miles is the average distance from the Earth to the Sun. Not Saggitarius A* or any other black hole.

[@sondre5174]

I don’t understand how such an error gets through quality control…

[@chrishartley4553]

@@sondre5174 it really is a clown moment.

[@CarFreeSegnitz]

Was about to comment the same. The closest black hole I’m aware of is Cygnus X1 at “only” 6,070 light-years from us.

[@AaronShenghao]

@@sondre5174 judge from Hank’s age, it was the very early stage of scishow

[@ravnwood]

Was gonna say the same thing. 93M miles is 1 AU or the average distance to our own sun.

[@OMalleyTheMaggot]

The idea of the universe having a set "end" can never NOT be depressing to me. Like, yeah, it might as well be an infinite amount of time in the future to US. But what about someone born 10 to the power of 32 years from now? How soul-crushing must it be to be born at the end of the universe?

[@florian2442]

SciShow: It's a common misconception that black holes "suck things in" Also SciShow: Black holes suck, black holes suck, black holes suck, black holes are cosmic vaccum cleaners

[@prashantchauhan2299]

this is the best black hole video i have seen this year. great work.

[@fakhruddinnalawala5451]

TBF, we don't orbit the black hole at the centre of the galaxy (BHatCoG), we orbit the centre of mass of the galaxy, to which BHatCoG only contributes a small percentage of since it's miniscule considering the mass of the whole galaxy.

[@P1taJ]

I really wish you would mark these as compilations in the title

[@kuntamdc]

Usually they do. Hmm

[@filonin2]

You can't even thumb it down to show your displeasure anymore either lol.

[@nankinink]

Putting compilation in the title must be lowering the number of vizualizations so they are hiding it to "cheat" the youtube's algorithm. Also, you still can thumb down. They still can see the number of dislikes, we, viewers, are the only ones that cant see it

[@jamesleatherwood5125]

pretty easy to tell the compilations from the standard videos. :) The compilations are always around 25 to 35 long or so. No other type of video they have done in their standard content are nearly that long. at most 10 or 15 minutes average, with many falling under the 10 minute marker and quite a few ending up even under the five minute marker.

[@jamesleatherwood5125]

Also, Unless they have changed it since you originally posted your comment, it actually DOES say "Compilation" lol

[@LordSlag]

In the segment that includes the 27 minute mark, it assumes that White Dwarves can't provide energy, which is ridiculous. They'll provide their heat, light, and particle winds for many tens of billions of years.

[@kevinmay7935]

Agreed, however that energy is purely residual. After the point it can be considered a white dwarf there is no new energy production. In fact all reactions available to a white dwarf will actually speed its cooling; I.e. Further iron production (the actual point of any star's death) who's atoms are so heavy it requires energy to fuse instead of having the excess usually driving effects like light production.

[@LordSlag]

@@kevinmay7935 Yes, but that's irrelevant to my point.

[@qzbnyv]

That first video on Black Holes had so many misconceptions for a video that claimed to clear up misconceptions :( It fell into so many of the tropes that the channels run by professional physicists painstakingly try to correct. Love you Hank, and sci-show, but ahhh I hope the later clips in this video are better.

[@LolUGotBusted]

Compilation Hank is a little behind on the times

[@MephLeo]

ACTUALLY black holes don't "eat" everything that comes close. Well, at least not supermassive black holes. A big part of the matter that orbits its accreation disk doesn't get to "fall" into its event horizon, but it's actually expelled as high energy blasts, which is what makes a quasar. Funny enough, black holes have a limit to how much mass they can accrete at any give time. Anything above that will not get "eaten", but "burped out".

[@illustriouschin]

And this is exactly the most likely danger of a black hole. We are lucky that Sag A* isn't eating anything right now but I wonder how often it does and what affect it has on us.

[@RebornRockerVids]

It's almost as if the universe knows how to keep itself in check.

[@user-ko4zp1wm2i]

Luckily our does and since we most likely exist another 50.000 Years we have the Technology to keep it Healthy. Since we are a part of it, the Universe has even far more advanced ways to keep itself healthy/kill itself. Imagine you build a Home which creates *tiny* creatures that keeps the house in check so they keep existing.

[@stirgy4312]

I kinda feel comforted - that Sagittarius A* is binding everything in our world together. Every living thing, rock, dust particle, atom, string... Like we're on some long family road trip.

[@joy-wire]

You can run but you cannot hide. *Eventually* we will consume all.

[@mintysingularity]

The galaxy does NOT orbit around the block hole-a common misconception that I'd expect you to avoid.

[@kuntamdc]

I think he said solar system. Does the galaxy move in the direction of a super cluster?

[@thetrashman5252]

@@kuntamdc Even that would be incorrect, the mass of the black hole would be insufficient to coerce an orbit out of the solar system given it's current distance from it and relative velocity. It is important to remember that galactic supermassive black holes often contain just a tiny portion of their galaxy's mass, and therefore do not act as gravitational anchors like the Sun does for the solar system. For the most part, the galaxy orbits itself.

[@mintysingularity]

@@kuntamdc nope. he said galaxy at least twice.

[@mintysingularity]

@@thetrashman5252 considering, though, layman are only just recently clueing into the fact that electrons don't orbit the nucleus like planets do.

[@kagannasuhbeyoglu]

Perfect information 👍 👏

[@alunchurcher7060]

If terraforming becomes possible we need to test it on the deserts making them green oasis rather than just sand. We are a long way from being able to do this out we need to do that as the rainforests are becoming to deleted for their resources.

[@louisrobitaille5810]

7:57 These Kugelblitz kinda make me think of supermassive blackholes. We don't know how they formed but we know that they couldn't possibly have formed based on the "normal" black hole formation methods. This might be an interesting path to look at 🤔.

[@angrypossumsx1259]

Just a quick correction Hank, the largest known supermassive black hole is TON 618 at 66 BILLION solar masses

[@LolUGotBusted]

Compilation Hank is a little behind on the times.

[@morrowdoug]

What's the 21st-century-human-technology effective event horizon of Sagittarius-A? Meaning, with the limits of how fast humans can currently travel in space, what's the distance a current space craft could approach the black hole and still be able to escape? (Obviously much, much farther away than the light-speed-defined event horizon, presumably?)

[@SuLokify]

The most interesting thing besides frame dragging and lensing geometries, to me, is that nothing falling into a black hole ever reaches the center, at least according to an observer outside it. Time gets more and more dilated as gravity increases, so an infalling observer would see the universe behind them get faster and more blue shifted until the end of time... Someone watching someone else falling in would see that person moving slower and slower until they stopped. That is, of course, only true if you could actually make those observations (past the event horizon, noise, etc). Still interesting to think that black holes out there have their mass concentrated on an infalling "surface" since nothing has had enough time to actually reach the center.

[@BornAgainstAll]

Why does this episode feel like it slipped from a parallel world to me?

[@shirleyzhang4309]

I love the way he says “your noodle would essentially be cooked”

[@krabbypattified]

32 minutes of SCIENCE

[@tiemanowo]

I love those compilations .

[@Wooperplays]

I wanna know where hank gets his flannels

[@heylofellas]

Small thing, whenever one talks about light's energy it's not useful to talk of E=mc² but instead use the full formula E²=m²c⁴+p²c² which would just give E=pc for light. So at 5:42 it's not actually thanks to "E=mc²" but actually to the whole thing. Sorry for the nitpick lol.

[@just_kos99]

In regards to the final segment, I"d recommend people read Isaac Asimov's short-short story, "The Last Question." And DO NOT peek at the last few sentences or you'll ruin the whole thing!

[@alewis17]

25:45 so glad you addressed that 🗿.. it should be called like "in Andromedas way"

[@GallowsBound1]

So could I say Reed Richards is going through spaghettification whenever he's fighting Galactus, The World Devourer?

[@cornbreadfedkirkpatrick9647]

And thank you for the collection of black holes talk I think you might be talking about Galactus pre Disney

[@carbon_no6]

Perhaps this has been answered already or it may not be public: the amount of time Reed has been hosting shows lately has greatly dwindled. Is he planning on continuing this path or is there a timeframe for his return to regularly hosting?

[@joanneoliver8610]

Good question. I like Reed hosting. :)

[@MrEnjoivolcom1]

They mentioned a while back SciShow Space was being dramatically cut. Can't recall the exact reasons, I just remember Hank & Reed stating there would be less of them.

[@carbon_no6]

Gotcha. Thanks for the information. Sucks that it got the backseat treatment.

[@Bally1001]

At 30:07 "there won't be many atoms left"......Well, what's gonna happen to all the dead cold planets, dead stars and all the other bits and peices left lying around?

[@Kram1032]

Wow that first clip. Really shows how much Hank changed. The voice is *completely* different. - Might be a different mic is involved too but I don't think that can explain this

[@kunjukunjunil1481]

Our galaxy is not* orbiting Sagittarius- A ,it's simply located at the Centre of the galactic disc (We are still in the Suns 'gravity well' so there is no comparison)

[@_andrewvia]

Hank wore the same shirt in two different videos! Doesn't he know? You HAVE to have a different outfit. Ask Savannah. Ask Caitlin. C'mon Hank! Get your wardrobe in order!

[@Heavenly_Heal]

Wait I don’t understand the concept of escape velocity being a velocity, it shouldn’t matter how fast you’re going right? If I go up at a consistent 1 mph (air res is negligible), it’ll take a long time, but I will eventually leave earth’s gravity right?

[@magilviamax8346]

It's the velocity you need to have at ground level, while having no engine or other force to push you, to reach outer space.

[@rogerszmodis]

By the time you gather enough kinetic energy to overcome gravitational potential energy you will be moving at the escape velocity. Think of it like trying to roll a ball up a hill, there is a minimum amount of energy needed to get to the top.

[@VariantAEC]

Air resistance is negligible at 1 MPH but when you've accumulated enough of those MPH even incrementally you'll be forced to deal with the associated air resistance. That's of course just before leaving Earth's atmospheric influence. If we argue no air no surface friction only the pure gravity of the Earth as if it and you were the only things in the entire universe (as the math equation typically goes) and the surface has been dried, but retained all the mass of all that water (and the mass of the atmosphere too) and the surface was polished to perfection having not a full Angstrom difference in height between its largest mountain and deepest valley. Yes, well considering all of that you would still need to traverse at a specific speed perpendicular to this objects surface (in this case the Earth) to break the influence of gravity. The specific speed which any specific body's gravity is rendered null from your perspective is known as the escape velocity.

[@Censtudios]

Wouldn't Kugelblitzes be a possible solution to how supermassive black holes formed in the early universe?

[@LolUGotBusted]

Enthusiast, not expert: I think one of the problems is 'shouldn't the Universe have been a black hole'; there's no easy way to figure black holes can form from deviations in the early Universe that doesn't permit the whole thing from collapsing.

[@Xitixcix]

Amazing! 🎉 Thx!!

[@jamesleatherwood5125]

19:27 "They Kinda win at space." I think you forgot your coffe this morning Hank! Space(time) as we know it breaks down ats you approache the singularity. And even if you dont accept the infinite singularity, The forces are still so signifcantly strong that it still warps physics as we know it beyond the recognizable. The may exist in space. They may devour space. The may interfere with space. But i doubt something that lacks the basic experience or idea of "physics as we know it" could be classified as "winning at space"

[@dalton6173]

The most unlikely thing to ever happen would be nothing unlikely happening meaning that there will be some collisions of stars within the galaxies that are combining especially whenever you account for such massive numbers. Now it could just be one collision or could be 20 however that's still a reasonably large amount.

[@k7999]

Stupid question. Can we just track our (solar system/Milky Way galaxy) and the all the black holes in the areas direction/rotation to figure out what's the center/biggest area of gravity/pull

[@lynniesaade4710]

The "escape velocity = c at the event horizon" thing is insufficient to define a black hole. You can launch things from a celestial body with less than the escape velocity if the thing has a continuous source of thrust. We launch rockets from Earth that way. This doesn't work for a black hole though. That's because a black hole is a curved space-time and the event horizon marks a boundary where all paths through space-time lead inward. Incidentally this also means black holes are not extremely dense objects in classical general relativity but space-time regions.

[@buckanderson3520]

I still think that black holes are responsible for the universe's expansion.

[@VGAstudent]

@8:11 you mention the fact that a kugelblitz could be made from light, but what happens to the light that should be emitted FROM a black hole, it always gets bent backwards towards the focal point of gravity, which is huge, so eventually, the light that should be emitted from the black hole should be adding additional energy to the system, shouldn't it? -- not if the emission source is to small to see, smaller than the planck length?

[@jeffreydungan1377]

I've always understood it to be energy cycling at best. The light tries to leave, it's pulled back in, new light gets energy to leave from the old light that tried to leave.... That's assuming that's there's enough energy for light to be able to try to leave in the first place.

[@kuntamdc]

@@jeffreydungan1377 I think light also equals heat, and heat gets away.

[@chrishartley4553]

Black holes can't produce any more energy than falls into their even horizon. Light doesn't built up then burst from a black hole like water from a dam. The intense gtravity prevents that as the escape velocity is greater than the speed of light. Which means that heat -emitted as infrared radiation- can't escape a black hole either, @kuntamdc

[@filonin2]

No, the light that should have been emitted from he black hole either falls into it or escapes after orbiting it. There is no mechanism to add energy. Light can't be emitted by something smaller than the Planck length because wavelengths are bigger than that.

[@chrishartley4553]

​@@filonin2 By difinition light can't be emitted from a black hole. Light can orbit a black hole and then escape that orbit but it can never touch the event horizon and be seen again. More energy is added to the singularity because matter falls in and matter is basically energy. There is no way for the singularity to radiate that extra energy except by Hawking radiation.

[@thevoiceofdarkness7655]

For a moment, I thought he had said "Yoda years".

[@koolk8301]

This makes petty fights/wars seem so redundant, doesn't it

[@God-ld6ll]

Might have mini black holes to cheat at a eating contest in the future or in the foundation.

[@MySerpentine]

The idea that humans would be even vaguely recognizable in 800 million years is hilarious.

[@jamesleatherwood5125]

So.... Just a thought.... The way you describe a kugelblitz and the theoretical temperatures involved.... any thoughts on the similarities between a theoretical kugelblitz for its immediate region of "space" and the big bang the "planck instant" prior to banging for its immediate region of existance? (hard to use physics terms to decribe existances states where physics has no meaning, but i think idea of the point comes through)

[@AlanW]

Holy cow! How did you get Carl Sagan for that one segment?!

[@foxrings]

"Gravity wells are for suckers" - Fraser Cain I don't think we will ever terraform Mars.

[@lohphat]

Once again no adjustment for gravitational time dilation is made to the BH animation. As matter approaches the EH it REDSHIFTS and slows due to time slowing down to near zero. But again and again you present animation of matter BLUESHIFTING and speeding up. How often are you going to present this incorrect representation?

[@Yutani_Crayven]

You would need an insane amount of light to create a black hole though. Even the brightest, most energetic stars in the universe don't have high enough photon density in their interior.

[@michaelrose93]

Please explain how the bosons are able to interact with one another to form a Kugelblitz.

[@WillMoff0]

please label compilations. Ive seen all of your videos I dont need to spend half an hour on rewatching them

[@l33tninja1]

Could we create a space engine that uses the pull of a temporary black hole to move us to the speed of light before the black hole dispeates leaving the ship to use the momentum to travel.

[@Hypernova87]

When black holes suck up all that light that can't escape, and it gets pulled towards the singularity, then that could create a Kugelblitz right?

[@Wreckz_Tea]

Ask my mom. Not because shes fat, but because she knows for a fact that i am the hungriest thing, not just in the universe, but in all of existence.

[@charlottepatey79]

"Keep taking care of our planet" When did we start doing that? Gotta love the optimism though.

[@Shanghaimartin]

Black Holes. Objects of infinite density. You know what else is infinite? How much better the old Sci-Show graphics and style used to be than the new sterile trash one.

[@Wesley_H]

Nobody: Black hole: 🎵 C is for Cosmos, that’s good enough for me. C is for Cosmos, that’s good enough for me. C is for Cosmos, that’s good enough for me. Ooooh! Cosmos Cosmos Cosmos starts with C! OM NOM NOM NOM NOM NOM!

[@darkblade190]

What'd the black hole have for lunch? A light snack!

[@dalton6173]

Just saying with time everything in orbit around something else will crash into the thing that it's orbiting. It may take longer than the university listed so far or it to you reach the center of the orbit and crash into the thing that is orbiting however given enough time that theoretically should

[@lordgarion514]

I forget where I heard it, but apparently simulations suggest Red dwarfs might calm down a bit as they get older.

[@pncka]

We don't orbit the black hole, we orbit the center of mass of the galaxy, the black hole just happens to be there

[@chetmiller523]

I still don’t understand how protons have no mass, when you can feel the weight of sunlight when stepping from the shade into the sunlight

[@TelmarSkahn]

Everyone talks about the sun exploding 4-5 billion years from now, ending life on Earth, but why has no one discussed the possibility that the earth will cool down causing it to lose it's magnetic field and become barren just like Mars possibly well before the sun expands?

[@dalton6173]

Are there any black homes we have found that are in the process of decay and the galaxy around them is breaking apart due to the loss of gravity holding it together?

[@abloogywoogywoo]

Gravity doesn't exist, it's a distortion in spacetime which is curved, so a black hole basically has _infinite curvature._

[@j.megatron]

We're not 93Million miles from the centre of galaxy aka residential supermassive black hole? Why did he say that and why did the diagram show that?????

[@jessmith7324]

How do you survive the great firewall outside the system?

[@torracatxdb1128]

I have a question. What if it shrinks into the lower dimensions and tears through the boundary and become a lower dimensional white hole either growing too big and causing the great collapse or decaying causing the great expansion of the lower dimesion. I think there's proof to because the universe expands exponentially faster like the decay of the black hole getting smaller or like the spray of hawking radiation like 2 dimensional guts being sprayed out back into the third from an over expanded center of infinate size that can't grow any more. Maybe we could calculate infinate size if we knew the size of the center of a third dimensional black hole.

[@seanb3516]

Black Holes are the Place where Campers Sleep......In-Tents :)

[@LandoCali5]

Hungriest in the universe? They haven't seen my family on Thanksgiving

[@nigeldepledge3790]

It's not very accurate to say a black hole contains a point of infinite density, because we don't know that that's right. It's what General Relativity predicts, but this prediction is exactly what tells us that General Relativity breaks down at such extremes of space-time curvature. Also, it's not very useful to define the event horizon as the surface at which the escape velocity equals the speed of light. Speed measured by whom and relative to what? More accurate and useful would be to state that the event horizon is the surface beyond which all future light-cones face only inwards.

[@Timesend]

It’s crazy how how the universe allows these black holes to exist, it’s like a glitch.

[@atee369]

Flagging this video as needing (not just auto-generated) subtitles. Please help us hard of hearing and deaf folks access your content!! 🥰🤟🏻

[@cornbreadfedkirkpatrick9647]

No stop sign speed limit nobody is going to slow me down, thank you for how to pronounce the ball lights I saw them on a paranormal show from another channel /country and they said it so fast thanks my German is rusty.

[@sharda_ann]

After seeing umbrella academy, I have a better appreciation for what an actual kugelblitz is. I genuinely thought they made that word up.

[@AllDayBikes]

31:16 So we're gunna be come internet explorer eh.

[@CosyMatt]

Wait isn’t the two galaxies mixing together called Milkdromeda?

[@nailboard6492]

You should all know, the smaller a black hole is, the more likely you are to die when getting close. If you find a black hole that's big enough and accidently fall into it, you might be falling long after your body has turned to dust under the rigors of time. So, Sagittarius A Star, our blackhole, is not one you'd want to mess with. Smaller stars and blackholes are more violent than their larger counterparts.

[@engineeringMemellionaire]

Hank states we are not black holes but ... if this is transmitted into space we have no way of disproving a black hole could detect this and be confused as an entity because it is in fact a black hole.

[@Darkstar.....]

For it to take such huge densities to make a black hole that means space time must have a definitive value for its resilincy against warping and it is huge. Has any one thought of it that way? How much can space time take without warping.

[@semaj_5022]

Just a note, the Milky Way galaxy doesn't orbit around Sagittarius A* specifically. It orbits around the galactic center of rotation, or the barycenter of the galaxy. Sagittarius A* is located at almost exactly this point, but is not in itself the galaxy's orbital center. Also 93 million miles is the average distance from the earth to the sun, and not to Sagittarius A*, that distance is around 26.5k light-years.

[@wackywankavator]

So. Can you shoot something into a balckhole or would everything be affected by tidal forces and pulled into the accretion disk?

[@agreene638]

Is there a black hole big enough that no time passes due to the time dilation of gravity?

[@dalton6173]

Humans may exist at that time however the majority of life that will be descended from Humanity will no longer be human

[@estergrant6713]

title: *is the title * me: “except your mom”