Yes, they may be inferred by the bending of light rays in their vicinity.
And the creation of the extraordinarily energetic Gamma Ray Bursts (GRB) may be due to one Black Hole absorbing another. Or at least one neutron star absorbing another.
Astronomers think that the areas around black holes suck everything in like when a tub drains. But black holes are large amounts of matter that is packed into a small area.
No
If blackholes reach the earth the earth will destroy. Blackhole are to large it can eat star easily.
Stephen Hawking is currently researching the origins of blackholes and the effects of blackholes on the matter surrounding it.
Astronomers believe that planets orbiting other stars, known as exoplanets, are common in the universe. They have been detected using various methods such as the transit method and radial velocity method. The discovery of exoplanets has greatly expanded our understanding of planetary systems beyond our own.
Albert Einstein.
The supermassive blackholes at the center of galaxies.
In space mostly around groups of old stars
It has both. Hope this helped, WoodWorkingMaster
yes they as scientists found in the middle of the messier galaxy
Dark matter may be invisible to light, but it can still be detected, through its gravitational interactions. Specifically, it can be detected: * By the fact that galaxies rotate way too fast, for the amount of known matter. * By gravitational lensing.
Astronomers have detected a quasar in a distant galaxy.