Science Questions

Can we see black holes from the Earth?

Yes, we can but not directly. We can see the effect they have.
Basically a black hole is a star that's died, that's collapsed. Unbeknownst
to many people many stars are in fact double stars or binaries. The dead
star, the collapsed star can form a black hole. The gravitational fields
are intense. It sucks material from its companion star and forms what we
call an accretion disc around it. The accretion disc emits x-rays and we
know of many stars that are x-ray stars and these are black holes.

November 2007