2007-03-26 02:49:05 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
A black hole is an object with a gravitational field so powerful that even electromagnetic radiation (such as light) cannot escape its pull.
Both Newtonian physics and Einstein's general relativity predict the existence of black holes, but general relativity provides a much more accurate and informative analysis.
2007-03-26 02:57:42 · answer #1 · answered by Anonymous · 1⤊ 0⤋
A black hole is a theoretical entity.
If a black hole could exist it would be described as follows.
All celestial bodies have a surface gravity.
The gravity determines how fast a satellite must travel to remain in orbit.
On the earth the surface orbital speed would be something under 25,000 miles per hour.
With a black hole the surface gravity would be such that a satellite would have to travel at the speed of light to maintain an orbit at the surface.
Since nothing can exceed the speed of light the entity cannot emit any light so it is called a black hole.
2007-03-26 10:02:12 · answer #2 · answered by Billy Butthead 7 · 1⤊ 0⤋
A blackhole is wat is formed after the callapse or implosion of a very old star, the energy from this implosions creates a vacuum so strong not even light can escape.
2007-03-26 09:59:13 · answer #3 · answered by achilles 2 · 0⤊ 1⤋
a black hole is the region around a singularity from which light cannot escape.
the singularity itself is the remains of a dead star, or a leftover form the big bang.
black holes will eventually die through hawking radiation.
2007-03-26 18:02:32 · answer #4 · answered by Tim C 5 · 0⤊ 0⤋
blackhole are "born" after the death of a star/sun.
blackhole cannot die/die out. it lives forever.
2007-03-26 13:01:43 · answer #5 · answered by Young Einstein 2 · 0⤊ 1⤋
Something so massive that everything disappears into it with gravity so huge that even light cannot escape it.
2007-03-26 09:56:15 · answer #6 · answered by Gene 7 · 0⤊ 0⤋
oprah
2007-03-26 09:56:27 · answer #7 · answered by whiteman 5 · 1⤊ 2⤋