Kip ThorneThinkers

A Black hole is inescapable not because you are falling into a space direction, but because you are being pulled into a time direction. Everything is pulled inexorably forward by the forward flow of time.

A Black hole is an object whose mass and energy is not in the singularity at its center but in the very curving of space and time created when the star that made it exploded.

A Black hole is not made of matter, but by space and time. -

A Black hole is surfaced by a horizon; which is not a material, but is simply the warping of space and time. If you fall across the horizon, you wouldn't know it; and yet you'd never be able to escape

The Black hole is numerous — in our galaxy alone, black holes exist on the order of a hundred million. These are generally only about 10 miles across but each weighs as much as ten suns.

A Black hole is not just a bending of space, but also time, slowing relatively closer to its center. If you are falling into a black hole and looked out from the event horizon, at your friends on a spaceship, you'd watch their lives zoom by and disappear millions of years into the future in minutes while you would appear frozen to them as they look down.

A Black hole is rotational — it typically spins like a planet on an axis at almost the speed of light with the larger black holes. A giant blackhole can be spinning at a rate of one revolution every 10 minutes to an hour.

A Black hole is an enormous source of energy - 40% of the energy can perhaps be harnessed.

A Black hole is very cold, close to absolute zero, for the energy is not in thermal motion, but the object unable to emit radiation because it's made of warped space and time.