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It is thought that a black hole begins with a star of at least three times the mass of our sun. Less than that would remain stable as a white dwarf or a neutron star. There are exceptions, such as the theorized "microscopic Black Holes," but the above is the usual scenario.
As the star uses up its fuel, its temperature is no longer high enough to produce energy that would balance its own internal gravity, and it begins to collapse into itself. Depending upon its mass, it may stabilize as a dwarf star or a neutron star; but given enough mass, it will collapse completely, forming a black hole.
Note that this answer goes directly to the end result, skipping over the intermediate stages of degeneration, such as supernova-formation.
What else can I help you with?
What will happen to are earth in a black hole?
Should Earth ever collide with a black hole, it would get destroyed.
What happens if a black hole runs into another black hole?
They will merge to form a single black hole with the combined mass of the town that merged.
Would one cubic light year of water form a black hole?
No, one cubic light year of water would not form a black hole because the mass of the water would not be dense enough to collapse into a black hole. The density of water is much lower than what is required for a black hole to form.
What would happen if two black hole were to merge into each other?
You would have a black hole the size of the combined mass of the two black holes.
What would happen if a meteorite hit a black hole?
It would be torn apart by tidal forces as it approached the black hole. Once it crosses the event horizon id disappears into the black hole forever.
What will happen when a black hole gets too close to another?
The two black holes will merge to form a single, larger black hole with a mass equal to the combined masses of the original two.
When did Black Hole - comics - happen?
Black Hole - comics - happened in 1995.
When did Black Hole Assault happen?
Black Hole Assault happened in 1992.
Do black holes just happen?
No. Most black holes form when an extremely massive star dies and the core collapses, becoming a black hole.
When a black hole dies what happen to the stuff inside the black hole?
It disappears forever
What is going to happen when the black hole destroy the universe?
Well if it DOES happen and a black hole DOES destroy the Universe, then we won't be around to worry about it.
What will happen if something gets close to a black hole?
Objects which approach a black hole will get sucked into it.
When did Black Hole - video game - happen?
Black Hole - video game - happened in 1981.
What happens when a black hole forms in a black hole?
A black hole can't really form inside of another black hole. If you think of a black hole forming after a star goes supernova, then there isn't really a star to go supernove inside of the already created black hole. In fact, there isn't even any space inside of the blak hole for anything to happen. Two black holes can join together, but they wil eventually go to one.
How massive does a star need to be (at least) in order to form a black hole when it collapses?
Current estimates suggest that a star must be at least 25 times the mass of the sun to form a black hole. In most cases only a fraction of the star's mass will actually go in to forming the black hole.
What would happen in a black hole?
nothing
What would happen if you juumped in to a black hole?
If you jumped into a black hole, you would be stretched into human spaghetti.
