[Phoenix Flame]

The vastness of space. Isn't it amazing!

Black holes are only formed from the largest of stars.

The more massive the star, the more matter/gravity it has. When the star exhausts it's fuel, it begins expanding before it collapses in on itself (as other's have said) turning into a black hole.

There are even super-massive black holes. One is believed to be at the center of the Milky Way galaxy.

I once hypothesized that if you could control how gravity worked, you could travel faster than light. My thought is that gravity acts faster than light travels. If you placed an object with large mass in an area of the galaxy where another object's mass would tug at it - I believe that the trajectory of the two objects would change before the light from one would get to the other...

I thought it was a cool theory!