Current Events > Why the hell is there a black hole smack dab in the middle of nearly every

(+) Yeah! (+)

Galaxy in the universe?

They seem to be a fundamental aspect in the organization of large to rediculously large manifestations of matter/gases. So were they installed at the very beginning of the simulation or are they a corrective or maybe even preventative measure developed by the "intelligence of the system" to make sure the system doesn't crash?

I guess what I'm really asking is . . .

Are black holes extra-dimensional case fans?

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they're the gamefaqs mods of the universe

they destroy everything good and make their own rules

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Because of entropy. All systems inevitably collapse.

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lol interesting.

I mean, Hell there's a theory that our sun (and other stars in general) is a generator pulling energy from another dimension so...why not? There has to be something to counterbalance all of that sending the energy back out.

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^ I'm pretty sure you're correct.

It's a logical conclusion.

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Black holes manipulate gravity and space the same as any regular star or massive object in general. And super massive blackhole in this regard are second to none.

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What would happen if the nearest huge (larger than normal) star collapsed and somehow became a black hole overnight? Would we be sucked into it?

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nevershine posted...

What would happen if the nearest huge (larger than normal) star collapsed and somehow became a black hole overnight? Would we be sucked into it?

No. You wouldn't know anything had changed except that there would be one less pinprick of light in the night sky.

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Is this indeed so?

Cite your sources.

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BlingBling22947 posted...

Is this indeed so?

Cite your sources.

...Common sense?

These stars are millions of light-years away. Them becoming a black hole overnight isn't going to affect us.

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This doesn't seem peculiar to me at all. Black holes have a high gravitational pull. So it makes sense that they would be surrounded by lots of stars and planets. The peculiar thing would be if there were black holes with nothing around them. Perhaps there are some that have pulled everything in range into them, but there's nothing left to pull, so there are 'invisible' black holes that are super strong.

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It's probably more like black holes are so heavy they grab everything nearby, resulting in a galaxy.

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Aristoph posted...

No. You wouldn't know anything had changed except that there would be one less pinprick of light in the night sky.

To add to that, you wouldnt notice the change for hundreds of years.

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8-bit_Biceps posted...

This doesn't seem peculiar to me at all. Black holes have a high gravitational pull. So it makes sense that they would be surrounded by lots of stars and planets. The peculiar thing would be if there were black holes with nothing around them. Perhaps there are some that have pulled everything in range into them, but there's nothing left to pull, so there are 'invisible' black holes that are super strong.

I heard they don't have a strong gravitational pull when you get sufficiently far away. I think it's more likely this is just where a lot of the star dust and gasses ended up gathering and making a super massive black hole than that everything is revolving around its SUPER gravity. If I'm wrong prove me wrong though.

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spiral galaxies do

its just stardust going down the drain
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E32005 posted...

spiral galaxies do

its just stardust going down the drain

I mean though, isn't part of it the stardust nearby attracts other stardust? Not that the black hole itself is literally draining everything in and of itself. I mean it seems that way because of how we are used to things working in our world, but not actually what's literally going on?

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I've read that Black Holes are a form of stars and that they have a gravitational pull that mega galaxies orbit around

Because that's how most spiral galaxies were formed. Old star clusters died and collapsed into a black hole and in time, these galaxies collided with each other, becoming larger and larger.

Fun fact: Time moves much slower the closer you get to the bulge, relative to the arms. If there was a copy of Earth near Sagittarius A, they could possibly be behind hundreds, thousands, even millions of years out of sync depending on the gravity there.

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Black holes dont just pull everything into them. A star that collapses into a black hole has the same gravitational pull as the star had, iirc.

So if our sun magically turned into a black hole for example, the only thing that would change would be the fact that there would be no sunlight. And wed all die because wed freeze quickly and go into a permanent ice age

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They're basically giant puckering buttholes and stars and planets are chunks of shit and toilet paper stuck in ass hair.

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Samurontai posted...

Black holes dont just pull everything into them. A star that collapses into a black hole has the same gravitational pull as the star had, iirc.

generally less, in fact, because part of the collapse is a supernova in which the heavy metal core of the star is expelled (and that's how you get planets!)

gravity is proportional to mass and inversely proportional to the square of distance from the origin

supermassive black holes at the center of galaxies are as likely to be the effect of mass concentration around them as the cause of it

in any case, supermassive black holes provide a source of gravity that remains relevant for orbits even at very, very long distances (but their event horizon is a lot shorter). they're far more massive than any star that is capable of existing.

also irregular galaxies don't have supermassive black holes at their center

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I fucking love space

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Lunar_Savage posted...

lol interesting.

I mean, Hell there's a theory that our sun (and other stars in general) is a generator pulling energy from another dimension so...why not? There has to be something to counterbalance all of that sending the energy back out.

What theory is this?

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Lunar_Savage posted...

there's a theory that our sun (and other stars in general) is a generator pulling energy from another dimension so...why not? There has to be something to counterbalance all of that sending the energy back out.

https://i.imgur.com/xFVbmbO.jpg

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Mr Hangman posted...

This is like asking why is there a star in the middle of every solar system or why is there a planet in the middle of every system of moons. A central gravitational attractor is why the structure of a galaxy exists in the first place.

it's more difficult to grasp how a supermassive black hole has that much mass relative to the galaxy's billions of stars than it is to grasp how a single star has that much mass relative to it's solar system's dozen planets

to someone even a little off mount stupid it seems like local gravitational interactions between stars on the arms would outstrip that of the core, given their numbers and the shorter distance.

and to astronomers studying the core the answer is \_()_/

supermassive black holes are weird.

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wow are they really that big in size to have a gravitational affect on the entire galaxy?

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The idea that we could blink out of existence any second and have no idea why is hilarious.

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malenz posted...

wow are they really that big in size to have a gravitational affect on the entire galaxy?

yes. imagine that their density is comparable to a regular black hole.

a regular black hole is 6km in diameter per solar mass it contains.

the diameter of the supermassive black hole at the center of the andromeda galaxy is 830 million km

this businessinsider article has a neat little animation that walks through it so you can at least try to grasp the magnitude of the difference

https://www.businessinsider.com/black-hole-how-big-largest-universe-2019-5

some cosmologists project that the universe will eventually end with nothing containing any energy except black holes

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well I've definitely been living on Mount Stupid in this topic then

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Why is there a government smack dab in the middle of every country?

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nevershine posted...

What would happen if the nearest huge (larger than normal) star collapsed and somehow became a black hole overnight? Would we be sucked into it?

Nope. The mass of the object doesn't change, and we wouldn't know about it at all unless we knew which star disappeared from the sky, and that could take hundreds to thousands of years to see.

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malenz posted...

well I've definitely been living on Mount Stupid in this topic then

I don't agree, asking questions and learning from your mistakes is quite the opposite.

there's a theory that our sun (and other stars in general) is a generator pulling energy from another dimension

is it a sun dimension? that's fucking metal
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Without the black hole at the center of the Galaxy there wouldn't be anything to hold the Galaxy together. If the sun suddenly disappeared all the planets in our system would fly off tangentially to their current trajectory. Likewise without a black hole, the Galaxy can't hold itself together.

Now I suppose theoretically you don't need a black hole, just a body of equivalent mass, but it turns out that the amount of mass you need makes it very difficult that it won't eventually turn into a supernova and then later into a black hole.

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Pancake posted...

there's a theory that our sun (and other stars in general) is a generator pulling energy from another dimension

is it a sun dimension? that's fucking metal

There's a theory that on the opposite side of the sun is another Earth called Gor where everyone understands their proper place in life as they should

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I love space topics. Makes you realize how insignificant we truly are in the universe.

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*learns 'sword and planet' is a genre title*
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Pancake posted...

*learns 'sword and planet' is a genre title*

Basically the Barsoom series

More familiar: Masters of the Universe, Thundarr the Barbarian, etc

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Is there really a black hole in the center of most galaxies? I had no idea.

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Tyranthraxus posted...

Without the black hole at the center of the Galaxy there wouldn't be anything to hold the Galaxy together. If the sun suddenly disappeared all the planets in our system would fly off tangentially to their current trajectory. Likewise without a black hole, the Galaxy can't hold itself together.

Now I suppose theoretically you don't need a black hole, just a body of equivalent mass, but it turns out that the amount of mass you need makes it very difficult that it won't eventually turn into a supernova and then later into a black hole.

Dark matter holds galaxies together just as much if not more so than supermassive black holes.

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ViewtifulGrave posted...

Dark matter holds galaxies together just as much if not more so than supermassive black holes.

The existence of Dark matter hasn't actually been proven. It was theorized based on running simulations of the universe where if you only had observable mass galaxies wouldn't form at all but if you added 5x times more mass that was unobservable galaxies formed properly.

We just don't have a better theory at the moment

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They dont really call it dark matter anymore. A lot of people just call it dark energy.

and dark energy works as a direct opposite to gravity. Instead of pulling things in, it pushes things out. Its theorized to be the reason as to why the universe is constantly expanding

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Samurontai posted...

They dont really call it dark matter anymore. A lot of people just call it dark energy.

and dark energy works as a direct opposite to gravity. Instead of pulling things in, it pushes things out. Its theorized to be the reason as to why the universe is constantly expanding

Dark Energy is a separate theory. Basically the universe is theorized to be made up of 75% unobservable energy, 20% unobservable mass, and 5% observable everything else.

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archedsoul posted...

I love space topics. Makes you realize how insignificant we truly are in the universe.

I love how literal Star Wars uses South as a direction in space.

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Tyranthraxus posted...

Dark Energy is a separate theory. Basically the universe is theorized to be made up of 75% unobservable energy, 20% unobservable mass, and 5% observable everything else.

Learn something new every day

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The universe is very strange. Everything outside of our solar system that we see is in the past. We don't know what's really happening out there. We can only make predictions. It's like every place in the universe is its own bubble. It's a mind boggling canundrum. For all we know there could be many life threatening phenomenon heading directly towards us but we wouldnt be able to see it until it hit us.

Crescente posted...

we wouldnt be able to see it until it hit us.

this is extremely inaccurate

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Tyranthraxus posted...

Dark Energy is a separate theory. Basically the universe is theorized to be made up of 75% unobservable energy, 20% unobservable mass, and 5% observable everything else.

So wait, is that the equivalent of saying its 75% dark energy, 20% dark matter, and 5% stuff that we actually know about?

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Shablagoo posted...

So wait, is that the equivalent of saying its 75% dark energy, 20% dark matter, and 5% stuff that we actually know about?

5% shit we can see/detect. Not necessarily know about.

And like 90% of it is Neutrinos.

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