The Black Holes-Thread

[Sigurd]

• It is a very very big star, at least three times a big as the sun, that collided because the thermic pressure inside ceased.
• The mass gets compressed to such a density, that the sun would end up with a diameter of 3 km only.
• And because of its gigantic density, the escape-velocity (sorry a direct translation) is bigger than the velocity of the light. Its gravitation is so gigantic that it catches every light falling upon it, so that we actually cannot see it.
• What leads us to the conclusion, that a black hole is indeed not black, but invisible.
• Its mass is so big that it disrupts the space/time continuum and thus, there is no time at all inside it. Why?
• And because there is no time inside, there is no perception, and no information could ever reach us from the inside.
• Dying from a black hole means you just get attracted by that corpus, and because of its incredibly gravitation, you get immediately squashed to the size of nano-pieces on its surface.

I think Stephen Hawking revised this point and recently too. Apparently black holes never completely destroys what falls in but continue to emit radiation.
To quote him:

The Black Hole only appears to form but later opens up and releases information about what fell in, so we can be sure of the past and we can predict the future.

From the top of my head, I think there was a theory that spiral galaxies such as the milky way we live in, rotates around a black hole.