Your question as defined makes no sense. How can something re-appear if its already there. But if it can appear and dis-appear. Your answer is yes. If the black hole is microscopic to the point that it can't suck in enough matter to feed it. It will collapse.
Yes black hole is last stage of a star
No, it does not appear to have a giant cross. It is called a "Black" hole because it absorbs all the light that hits the horizon, reflecting nothing.
Green.
A black hole is an objects with such strong gravity that not even light can escape them. If observed up close a black hole would appear as a completely black sphere.
Like all the others - Superdense stars collapsing.
It lasts until evaporated.
black hole
The black hole, you have to destroy all the castles and get all gold medals to get it
The collapses star gets squeezed by collapses gas and turns into a black hole.
A Schwarzschild black hole is a non-rotating black hole. The Kerr black hole is a rotating black hole. Since the latter is more complicated to describe, it was developed much later.A Schwarzschild black hole is a non-rotating black hole. The Kerr black hole is a rotating black hole. Since the latter is more complicated to describe, it was developed much later.A Schwarzschild black hole is a non-rotating black hole. The Kerr black hole is a rotating black hole. Since the latter is more complicated to describe, it was developed much later.A Schwarzschild black hole is a non-rotating black hole. The Kerr black hole is a rotating black hole. Since the latter is more complicated to describe, it was developed much later.
similarly black hole is the last stage of star....