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While it is impossible to actually SEE a black hole, scientists have detected the presence of a great number of black holes in the universe. It is very likely that there is a supermassive black hole at the center of almost all large galaxies including the Milky Way.
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∙ 14y ago
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∙ 14y agoBlack holes happen when a star collapses. Stars are kept "inflated" by the energy radiating from their core. When the energy falls below a certain level, the star collapses in on itself due to the core's tremendous gravity. If the gravity is high enough, it prevents even light from escaping, and a black hole is created.
Nearby matter is continually drawn into the black hole by its gravity. When the matter is torn apart by the gravity as it enters, it releases x-ray radiation. Although we cannot see the black hole itself, we can determine a great deal about it by studying this radiation.
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∙ 12y agoElectron-degenerate matter. It's very unlike anything with which we have ordinary everyday experience, and is essentially atomic nuclei "floating" in an electron "gas" that actually behaves more like a solid (like I said: unlike anything with which we have ordinary everyday experience).
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∙ 8y agoYes it is just a white dwarf star which used up all of its fuel so produces no more light. Since it takes an extremely long time for this to occur, more than the age of our universe (about 13.7 billion years), there are thought to be no black dwarfs in existence.
Not quite. A black dwarf is a white dwarf that has cooled to the point that it no longer glows. A white dwarf is the collapsed remnant of the core of a low to medium mass star that ran out of fuel.
Wiki User
∙ 11y agoA black dwarf (See related question) is not formed per see but is a process of cooling from the remnants of a dead star.
When a star dies, it leaves behind a stellar remnant (See related question) which is still hot because of the nuclear fusions process that kept the star "alive" - a bit like the embers in a fire.
Over billions of years (No black dwarfs have yet been observed) that the residual temperature escapes into the Universe, leaving behind a cold lump of rock. That is a black dwarf.
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∙ 10y agoBlack holes, technically, have no color, since light does not escape from a black hole. However, if you looked in the direction of a black hole, you would see a distorted image of whatever is behind it.
From outside the event horizon - black.
From within - no one knows for sure,. but probably a very bright blue.
a black hole is no colour at all because you need light to have colour and not even the speed of light is fast enough to escape the black hole
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∙ 13y agoFirst of all, let's define what a black dwarf is for that we need to define what a "white" dwarf is...
Without going into a great amount of detail, a white dwarf is left over after a star around the size of our sun burns all of it's available fuel and "dies". The white dwarf is, for all intents and purposes, the core of such a star that is still "white hot" and for that reason still emits radiation. There is no active nuclear source of this radiation. Since there is nothing to perpetuate the release of energy, this "white" dwarf will eventually cool to the point where there is no more radiation being released. At this point the "white" dwarf is considered to be a "black" dwarf.
On thing is for certain... The universe is not old enough for there to be any black dwarfs as yet. Why? Because the universe is only 13.7 billion years old and there has not yet been enough time for a star that would end it's life as a white dwarf, then to cool sufficiently to be considered a black dwarf. In fact, there are some other fairly complex physical properties of the white dwarf that are not yet well enough understood to know if this would ever actually cool completely.
So having said all of that, I'm not really sure what another "name" would be...
I'm particularly partial to Fred myself... :)
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∙ 13y agoBlack holes can be found anywhere a massive star existed.
Most, if not all, galaxies have a supermassive black hole at their centre, and there are a number of stellar black holes throughout the galaxy.
V4641 Sgr is believed to be the closest known black hole to Earth at 1,600 light years away.
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∙ 14y agoA black hole, by definition, is black, because not even E&M radiation ... including light ... can escape from it. So assuming it exists, it wouldn't be visible in the usual sense, even from quite close up. We have to infer its existence and its properties from its effect on the matter and space around it. Modern astronomers and cosmologists are satisfied that this is being accomplished, with observations of things like gravitational lensing around black holes, and disks of matter falling into black holes.
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∙ 14y agoA black hole is one of the possible results of a star running out of fuel (hydrogen) to burn. If a sun that is 15 or more times the size of our sun runs out of hydrogen gravity will begin to collapse the star. The core of the star will end up being nothing but iron which causes an explosion when crushed together. This explosion is called a supernova. Because the star was so huge nothing remains in the core of the star and a black hole forms.
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Can a space ship go through a black hole without crashing?
there is no way for a ship to go through a black hole because the black hole rips the atoms from the object the come to it and spreads all the atoms around the black hole
What source causes a black hole in space?
A dead star. The dead star's smashed atoms come together, and are crushed again. This births a black hole
How did the black hole come in space?
a black hole is formed when a star dies (it explodes). sometimes it can also form a nebulae
What does a black hole do with what it suck in?
The material sucked in to a black hole becomes part of the black hole - that is, a black hole crushes matter to an nearly no size, at all.
Can any black hole turn into a neutron star?
No. A black hole will remain a black hole. A neutron star is a remnant of a star not massive enough to become a black hole.
Will a space ship get out of a black hole?
No. Once something enters a black hole it can never come out.
How do you take the sharks to the black hole in poptropica?
You get the shark to come near you and follow you to the black hole, then when you get to the black hole you turn a let the shark in. Have fun!
Is a black hole going to come?
Maybe...
Where do you come out if you went in a black hole?
Dont hold me to this, but any thing that goes into a black hole does not come out. In suggesting that you reapear, you would be be refering to a wormhole
Can a space ship go through a black hole without crashing?
there is no way for a ship to go through a black hole because the black hole rips the atoms from the object the come to it and spreads all the atoms around the black hole
What form of enegry come from black holes?
Particles falling into a black hole release a large amount of x-rays as they do so. This is not energy from the black hole itself, but energy release that is a sign of a black hole.
When something goes in a black hole does it come back out?
Yes, but as a string of atoms erupting from the black hole like an explosion. Other than that, it is very unclear what happens inside a black hole.
Were did a black hole come from?
Black holes came from old big stars that went supernova as it dies. Supernova causes the star to collapse into a black hole
How do people get sucked into a black hole?
No human has ever come near a black hole. If one did, the intense gravitational pull of the black hole would pull them in and tear them to atoms, long before they reached the event horizon.
What source causes a black hole in space?
A dead star. The dead star's smashed atoms come together, and are crushed again. This births a black hole
How do you swim into the hole near the waterfall in Super Mario 64 DS?
That hole is the exit you come out of if you die in the secret level under the black brick, so you can come out of the hole, but you can't go in.
Did anyone observe black hole dazzling light?
Observing a dazzling light from a black hole is impossible because anything cannot come out of black hole once after entering it's event horizon (even light) because black hole very very very strong gravitational field.
