Quote from: jerrygg38
The latest report from the astronomers is that our galaxy black hole exploded 6 million years ago producing very high temperature energy which left the center of our galaxy empty of stars.When we say a bomb "explodes", we mean that matter comes out of the bomb at high temperature and high velocity. Effectively nothing comes out of a supermassive black hole - but things that are close to the black hole can be heated to high temperatures, and be ejected at high velocity.
The supermassive black hole in the center of our galaxy will not explode in the same way that a micro-black hole can explode. The quantum effects of Hawking radiation can almost be ignored on large black holes.
The types of things that can cause supermassive black holes to act more dramatically include:
- A large bunch of stars falling into close orbit around the black hole, creating a super-hot accretion disk, and blasting jets of matter out of the disk of the galaxy at a significant fraction of the speed of light. Currently, our galaxy seems rather "quiet" in this regard (bearing in mind that what we see now actually happened tens of thousands of years ago).
- A merger with another supermassive black hole from another galaxy (our galaxy has apparently swallowed a number of smaller galaxies in its lifetime, and we are on course to be swallowed by the Andromeda galaxy in about 5 billion years). It is thought that the orbital tugs of two orbiting black holes will clear out a volume of space equivalent to twice their orbital radius. When they eventually merge, there will be a significant jolt of gravitational waves.
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