No, black holes are actually invisible because it can suck it Light as well, so no light can escape from the black hole.
No
black holes arent really things you can right a history pon, but theres a history of their discovery
Stephen Hawking is currently researching the origins of blackholes and the effects of blackholes on the matter surrounding it.
If blackholes reach the earth the earth will destroy. Blackhole are to large it can eat star easily.
There is a theory that tells that when you fall in a black hole, you are not destroyed but you are "teleported" to a white hole. The wormhole is a inter-dimensional tunnel that connects a black hole to a white hole.
Blackholes, space, etc
Albert Einstein.
Gravitation? Yes black holes have enormous gravitation but it is not completely vacuum. When matter gets sucked into blackholes, noone knows where the matter ends up. Black holes originate from a really dense star collapsing on itself like a cookie crumbling if you crush it with enough force.
Blackholes are not really holes, it is where a huge amount of matter has come together and has been concentrated into a very small area. Mass is related to gravity, any mass has gravity, but you don't really notice it until you have enough mass like that of the earth. There is so much mass at the centre of a black hole that even light cannot escape it's immense gravity - that's why it's black.
In space mostly around groups of old stars
It has both. Hope this helped, WoodWorkingMaster
The supermassive blackholes at the center of galaxies.