What elements/compounds compose the black holes.?

A black hole, a pinprick in space with a greater mass than the sun, is hard to describe in ordinary terms. But black holes have defining features, including the Schwarzchild Radius. If you approach a black hole in a spaceship, you begin to feel the tug of its gravity. read more

A black hole is a very odd thing; a remnant of an old star, it has mass but no atoms. The stuff of which it is made is so dense that it warps space and time; no ordinary matter can escape its enormous gravitational pull, not even light. read more

A black hole is a singularity, an incredibly large amount of mass reduced to a very small volume, essentially a single point. At that compression, the ordinary rules of atoms and motion cease to exist. Anything that approaches the black hole, even light, will eventually be pulled into that central singular point. read more