Well well well...
Reminds of someone saying "black holes suck!"
(maybe that was me when I was drunk
OK people, black holes don't suck, in any meaning. A black hole is not a hole (not as such that is, it is a singularity, which can be compared to a
"hole", or rather a pin hole...), and it is not even black.
A black hole is a former star, that has basically collapsed so bad that all of its mass is concentrated into a tiny sphere (well, tiny can still be a
few thousand kilometers, more even). That means that the density of the object is incredibly high, and its gravitational attraction is also. That is
why it seems to be black, because all light coming to it stays there, and thus we can't see it.
By comparison, a white hole would be an object able to cast enough light in every direction to always look perfect white! Though possible in theory, I
doubt that any of those can exist.
Now, if a black hole "slows time down"... Well, yes and no. It is all relative. Because of its incredible gravitational pull, time also is
distorted, but only when seen from outside: if one could go into a spaceship able to accelerate 1g, the earth gravitational pull (9.8 m/s² roughly),
that spaceship heading straight to the center of the galaxy (our galaxy), when that spaceship would reach the point, the man in the spaceship would
have experienced a 30 years trip. If then he stops instantly and gets back to earth in the same way, everyone will agree that he would be 60 years
older than when he left. If I remember it well (he he I'm old already for school things...), earth would be by then not 60 years older, but about
Any search on relativity and black holes and such will bring a lot of answers to such questions. I
already on black
holes. Very interesting page that explains a lot I think.