Due to light being unable to escape the black hole, we cann't see it! It's like trying to see in a dark room with a flashlight, that has dead batteries. You cann't see the light because their is none to reflect.
because the universe we live in is pitch black and black holes are also pitch black so it would be hard to see them since black holes and the universe are black
Black holes emit so very little radiation they are hard to see. Many black holes lie at the center of galaxies and there they are hidden by stars and dust.
The whole idea of black holes is that nothing, not even light, can escape from them. However, there are several indirect ways to detect them.
Black Holes are mostly located at Star's that have Died or Exploded from running out of heat or in which cases The Sun that hasent ran out of energy yet or other stars, you get what i'm saying
You can't see a black hole.
You can't see a black hole.
Black holes are that stars which has passed their all life or expired star and it absorb light of sun therefore cant reflect the ligh of sun, so its look like black holes.
After the black hole dies out, (see When do black holes die and/or How does a black hole get smaller) it will become just a vacuum.
Black holes does emit radiation, but they cannot be detected from earth. We use gravitational lensing to "see" the black holes.
Black holes are blavk because their gracity is so strong that light cannot escape for us to see.
If a star is younger in years than it is distant in light years we will not see it. It is there but because of its age and distance the star will be unseen as the light emitted from it has not reached us. Also black holes which use to be stars are 'invisible' as they do not emitt or reflect light.
See link
There is enough evidence for black holes - I don't see any problem there.