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Very, very long. A black hole will gradually evaporate, but this takes much longer than the current size of the Universe. A black hole of the mass of our Sun would take about 1067 years to evaporate, while a supermassive black hole might take 10100 years or more to evaporate (depending on its mass) - and this assumes it doesn't continue gobbling up matter in the meantime. Currently, a stellar black hole (as well as larger black holes) will absorb background radiation at a faster rate than they evaporate. For comparison, the current age of the Universe is only about 1.4 x 1010 years.
What else can I help you with?
What happens to stars that are black holes?
They will remain as black holes for a long, long time.
Does Saturn have any black holes around it?
No.
Did galaxies form around super massive black holes?
It's generally believed that galaxies first formed around "ordinary" black holes and over time, they grew into super massive black holes as stars were slowly "consumed" by the black hole.
Is it possible for a black hole to disappear and if it is how long will the process take?
Yes, black holes slowly evaporate after meeting critical mass or without any planets or star around it
What is bigger a quasar or a black hole?
It depends, Black holes can go from being microscopic to supermassive black holes that entire galaxies revolve around. It all depends on which black hole and which quasar.
Where do black holes go to?
No where. Black holes eat up every thing around it, including light. It just become part of the black hole. Hope this helped, WoodWorkingMaster
Did black holes exist in 1999?
Black holes did exist in 1999, and long before that. While black holes cannot be observed directly, they have been hinted at having existed by Einstein. The first real recording of the side effects of a Black hole was in 1971.
Are dead stars black holes?
Dead stars are not necessarily black holes. Dead stars can become white dwarfs, neutron stars, or black holes depending on their mass. Only the most massive dead stars can collapse further to become black holes if they exceed the Chandrasekhar limit, around 1.4 times the mass of the Sun.
What has the author Walter Sullivan written?
Walter Sullivan has written: 'The long, long love' 'Black Holes' -- subject(s): Black holes (Astronomy), Trous noirs (Astronomie) 'The War the Women Lived'
What do black holes form?
Black holes are sort of the final stage of stellar evolution; they don't form much else. Two black holes may merge to form a larger one, and after a very, very long time, they will evaporate.
How do black holes disapear?
Naw dawg, they stick around for ever.
What are black holes called when they suck in gas?
They're still called black holes. A black hole remains defined as a black hole as long as it absorb everything near them, both energy and matter, including gas.
