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.
Most black holes form when massive stars exhaust their fuel and their cores collapse. There are also supermassive black holes at the centers of most galaxies. Scientists are not sure how supermassive black holes form.
no because black holes can only form through supernovas.
The black holes from Gamma ray usually burst because of their energetic form.
Probably stellar mass black holes
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.
The energy that comes from black holes is called Hawking radiation.
We aren't certain, because 99.9% of what we THINK we know about black holes is theoretical. But the theory says that if two black holes do come too close to each other, they will merge to form one larger one. However, if the geometry of their approach is right, it might be possible for them to orbit each other.
Most black holes are believed to form when very massive stars die.
Black holes are outside the confines of both the Earth and the Solar System, the passing of our year does not affect when they form.
Yes. When the most massive stars die, their cores collapse to form black holes.
If five black holes came together they would merge to form a single black hole with a mass equal to the sum of the masses of the five original black holes.
Mostly the center of the galaxy.