26 New Black Hole Candidates Found In Andromeda 57
William Robinson writes "Astronomers have discovered 26 new likely black holes in the neighboring Andromeda galaxy — the largest haul of black hole candidates ever found in a galaxy apart from our own. The central region of the Andromeda galaxy is chock-full of black holes, according to extensive observations with NASA's Chandra X-ray Observatory."
These 26 black hole candidates add to nine previously known for a grand total of 35.
what happens (Score:4, Interesting)
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Re:what happens (Score:4, Informative)
Hawking radiation [wikipedia.org]
Re:what happens (Score:5, Insightful)
Actually, alternate universes and white holes are about as far from actually accepted theories as you can get, this side of string theory.
Actually, starting a response with "actually" makes anyone sound like a jerk.
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Everyone knows that anything that enters a black hole goes back in time. It is known as the Old Spock/Young Spock Star Trek Effect.
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In fact, some theorize that our universe was actually created by a "white hole", and all the matter in our universe came out of it.
Anyone can theorize anything. Some theorize that cats secretly rule the world. I theorize you're an idiot.
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Actually, matter that goes into black holes tend to go into an alternate universe, where there is what some might refer to as a "white hole", which is like an exit from the black hole.
In fact, some theorize that our universe was actually created by a "white hole", and all the matter in our universe came out of it.
The big thing that differs physics from math is that in physics you need to know the history of the science, not just the formula.
The white hole concept (And the wormhole idea.) is what happened when they let a couple of mathematicians look at physics.
A very simple model (but incorrect) for black holes is as a gravitational singularity. It was speculated that if there exists positive infinities that consumes matter then there should be negative infinities that extracts matter too, a kind of antigravity-hole
White holes came from a physicist... (Score:1)
The idea of a white hole was originally proposed by Igor Novikov, a Russian astrophysicist (with degrees in physics and astrophysics...). The idea is a valid solution to the Einstein field equations, and can be derived as a natural extension of the Schwarzschild metric. That is not to say they actually exist, only that they would not violate general relativity.
Such work is a perfectly valid approach to physics. You take a a tested theory and see where the mathematics goes, to see if it predicts new thi
Re:what happens (Score:5, Informative)
I suspect you're thinking about black hole evaporation [wikipedia.org]? It's a real phenomenon, at least theoretically, but the energy radiated in this manner from a typically-sized black hole is way less than the background radiation of the universe, so the mass/energy of the singularity continues to grow.
Incidentally, the evaporation phenomenon is also why you don't have to worry about the LHC ever producing a black hole that destroys the earth--any black hole it could create would radiate to nothing almost instantly.
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What prevents the black hole from sucking in additional matter from around it in order to stay alive? Its not like the black hole is in the middle of mostly empty space, its more or less 'inside' a planet full of matter to consume.
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The black hole would be so small that inside a planet full of matter would, from its perspective, mean being in the middle of mostly empty space.
Actually... White Hole citation? Re:what happens (Score:2)
Citation: White Hole (Red Dwarf) [wikipedia.org]
Excerpt:
As Kryten explains, a white hole is a very rare spacial phenomenon - for each action there is an equal and opposite reaction, and whereas black holes suck matter from the universe, white holes spew time back into it.
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This energy radiation is only theoretical, and has not yet been observed. Not with any sort of certainty, at any rate.
Re:what happens (Score:5, Informative)
What? No... You're completely wrong. I don't even know where to start. Not even radiation can escape a blackhole. The radiation blackholes cause, is hawking radiation. Hawking radiation is rather simple, the theory is that the universe is a constant froth of matter/antimatter being created in pairs. Most of the time these pairs collide and destroy each other immediately. On the event horizon of a black hole however, it's possible for the pairs to be come into being with 1 of the particles inside the event horizon and the other outside. So one escapes while the other is trapped. Since the trapped particle is the opposite of the free particle, it's "As if" the black hole emitted radiation, because the particle trapped has the negative effect on the blackhole that the escaping particle has. But it was NOT emitted. After BILLIONS of years this effect can eventually cause the blackhole to, for lack of a better word, evaporate. But this is not because it's giving off any radiation. Blackholes can not, nor will they ever, give off any type of radiation or matter. And the effect of Hawking radiation is so slow that the singularities will be the last things that exist in this universe for a very, very, very long time after all of our stars have run out of fuel.
Lastly, blackholes warp space and time. By the time matter passes the blackholes event horizon it's been torn to elementary particles by gravity. But even those elementary particles never reach the singularity. The warping of space-time is so great that time slows to nearly the point of stopping. They are in a perpetual free-fall towards the singularity but will never arrive. If you were falling backwards into a blackhole, and somehow had some magical device that allowed you to survive the decent, you would watch the end of time before your eyes. Granted it would be warped into a single point of light that would just snuff out, but you get the idea.
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Re:what happens (Score:5, Informative)
little problem is that Hawking radiation is only theoretical, we don't know if it exists. also, your description of fate of infalling matter or view from that reference frame is not known for certain because black holes are where quantum mechanics meets general relativity meets whatever the mechanism of gravity (quantum?) is. we just don't know.
Re:what happens (Score:5, Informative)
By the time matter passes the blackholes event horizon it's been torn to elementary particles by gravity. But even those elementary particles never reach the singularity. The warping of space-time is so great that time slows to nearly the point of stopping. They are in a perpetual free-fall towards the singularity but will never arrive. If you were falling backwards into a blackhole, and somehow had some magical device that allowed you to survive the decent, you would watch the end of time before your eyes.
You got this all backwards unfortunately. First off, the event horizon is not really a special location to local observers. You could be torn up to pieces way before the event horizon for a small black hole, or way after it for a very large one. For a local person in free fall, nothing special would happen at the event horizon.
Second, the time slowing down and taking forever to fall in would be what a distant observer sees. For the observer in free fall, they would reach the singularity in a finite amount of time. And for even large black holes, that finite time is actually quite short, so you would not see the whole universe evolve in front of you, you would very quickly reach a point where the stresses exceed any imagined material strength.
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Spaghettification isn't exactly a concern on the scale of humans. Its a problem for solar systems, sure, but a person isn't large enough to have that large of a difference. Its not an issue on tiny black holes and only becomes less of a problem the larger you get.
Of course ... all the things you state as if they were facts are really relatively new theories about how the universe works, but that one in particular shows you've been reading too much sci-fi.
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no. that radiation by which we detect them is merely heated gases spiraling into the hole. hawking radiation is a theory, we do not detect that for it is emitted at a very very low rate for a large black hole. Hawking radiation has never been detected.
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We can, however
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The atoms gets crushed under so much gravity that they break apart and turn into more basic materials which merges with the rest of the stuff in the black hole contributing even further to the mass. Likewise, the radiation (like light) get sucked in and joins the soup.
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Hawking showed that when you combine quantum field theory with black hole physics then they will produce what is now called Hawking radiation. The black hole will eventually evaporate away through this process. What finally happens is the subject of recent controversy. The physics is well beyond me, but the idea of it is that several current assumptions concerning physics lead to contradictions when considered in the context of black holes (in particular, entanglement leads to subtle problems), leading some
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I'm not sure anybody knows for certain ... a soup of muons and gluons and other things that happen when the laws of physics get stretched to the extreme. :-P
It doesn't 'go' anywhere (probably), and I don't think I understand well enough to know if it's even still technically 'matter' ... it just becomes more mass and more gravity, or something like that.
We'd need a TARDIS to be certain. ;-)
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I will add to all other uninformed responses with mine:
Aren't they endlessly into the singularity, but never actually reach it? I mean, they speed up almost to the speed of light (hence x-ray bursts), so time slows down for them more and more.
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to all the atoms and radiation that gets sucked into a blackhole? does it just disappear into nothingness?
It all adds to the mass, charge, and angular momentum of the black hole.
Candidate Number Seven (Score:2)
Interviewer: What would you say your biggest weakness is?
Black Hole: Dumb fucking question! [spaghettifies interviewer]
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Interviewer: Pretty much like any other candidate I've interviewed!
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Black Hole: Vote for me to be your black hole and I promise to suck! A lot!
Interviewer: Pretty much like any other candidate I've interviewed!
Whoa ... hold your horses !!
Those who want us to vote for them so they can stay in the White House *never* promise us that they sux
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Two protons walk into a black hole (Score:2)
First! (Score:3, Funny)
...In my frame of reference, at least.
Just found another black hole (Score:1)
26 New Black Hole Candidates (Score:2)
.. there's a reality show/politics joke in there, somewhere; I just know it...
Holy shit! We're doomed. (Score:2)
The miky way, our galaxy, is scheduled to collide with the andromeda galaxy in 4 billion years. What if we hit a black hole? This universe is getting more and more dangerous all the time.
Talk about a wild midseason replacement! (Score:2)
Talk about a wild midseason replacement!
Each week, we eliminate some of them, until the live broadcast, at which point America texts in their votes, and they pick one to be black hole?
The real question isn't how many... (Score:1)
Miscategorized (Score:1)
I thought this was a story on the 2016 presidential race.
As I understand it... (Score:1)
*badumtisss*