Black holes can be detected due to the effects on near-by stellar objects, such as stars etc.
No one we know about
The black hole itself cannot be seen, however, its pulling effects of the surrounding area can be seen.
No non-fictional astronomical body know as black circle. If the question is meant to employ the term 'black hole' in space, what a black hole does is to exist.
No, a black hole is not actually a hole in space. It is a region in space where gravity is so strong that nothing, not even light, can escape from it.
the black hole is a matter in outer space that is made by the force of gravity
Yes, a black hole could travel through space.
Obvisouly it is not a black hole! :)
No one has ever been "out of space" and we don't know of any way to get "out of space".Going into a black hole might take you "out of space", but we don't know that it would, and we do know that it would certainly kill you.
Yes
no because it would destroy the space if it went in to a black hole
No. Once something enters a black hole it can never come out.
you have to go to space and find one and get sucked into the black hole