How can you tell the age of a black hole?
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How can you tell the age of a black hole?
If the black hole formation was accompanied by some type of explosion, say a supernova, you could estimate the age of the black hole by inspecting the properties of the supernova remnant.
How old is the average black hole?
The most distant black hole ever detected is located in a galaxy about 13.1 billion light-years from Earth. (The age of the universe is currently estimated to be about 13.8 billion years, so this means this black hole existed about 690 million years after the Big Bang.)
What did Einstein call black holes?
Black holes In 1939 he published a paper that argues that a star collapsing would spin faster and faster, spinning at the speed of light with infinite energy well before the point where it is about to collapse into a Schwarzchild singularity, or black hole.
What is the age of a black hole?
By black hole most of us mean the Schwarzschild metric, but the Schwarzschild metric is time independant i.e. it represents a black hole that has existed for ever and will continue to exist for ever. So it has no age in any useful sense of the word.
Could two black holes have the same mass but different ages?
If your two black holes began with identical mass, but at different times, the younger hole would have lost less mass than the other through Hawking radiation, with an age difference of only 10 Billion years the mass difference would be unmeasurable (with current technology).
How much mass does it take to create a black hole?
If the core’s mass is more than about three times the mass of the Sun, the equations showed, the force of gravity overwhelms all other forces and produces a black hole. A video about black holes.
What is the most distant black hole ever seen?
What is the most distant black hole ever seen? The most distant black hole ever detected is located in a galaxy about 13.1 billion light-years from Earth. (The age of the universe is currently estimated to be about 13.8 billion years, so this means this black hole existed about 690 million years after the Big Bang.)