BLACK HOLE
...the force of the material, and the core will collapse deeper and deeper into the fabric of space and time, until it disappears from the visible universe altogether. At this time, it becomes a point in space with an infinite density - a black hole. A black hole is composed of the accretion disk, the event horizon, and the singularity. When a black hole forms, the celestial envelope during the great explosion turns into dust. This stardust is called the accretion disk. It rotates around the black hole's event horizon at a very fast velocity until it is all sucked up into the singularity. The event horizon is an imaginary line, or plane, which spans the width between the outer and the inner horizon. Nothing can escape the gravitational pull of a black hole after crossing its event horizon. This is the reason the black hole appears black; once light enters in, it cannot...