What is mean of BLACK WHOLE in space?

Answer 1

"A black hole is an object predicted by general relativity,[1] with a gravitational field so powerful that even electromagnetic radiation (including light itself) cannot escape its pull.[2]

A black hole is defined to be a region of space-time where escape to the outside universe is impossible. The outer boundary of this region is called the event horizon. Nothing can move from inside the event horizon to the outside, even briefly, due to the extreme gravitational field existing within the region. For the same reason, observers outside the event horizon cannot see any events which may be happening within the event horizon; thus any energy being radiated or events happening within the region are forever unable to be seen or detected from outside. Within the black hole is a singularity, an anomalous point in space-time where all matter is infinitely dense and is infinitely compressed into nothingness."

Answer 2

simply by fact of a caveat of quantum mechanics, black holes particularly lose mass over the years(Hawking Radiation). it particularly is an extremely sluggish technique and at the instant, a black hollow might consume greater mass (as capability from photons) from the cosmic microwave background radiation than it might lose via Hawking radiation. yet ultimately, simply by fact the CMB subsides, black holes will evaporate if it would not get greater mass. the easy would not ought to purely finally end up in yet another black hollow simply by fact the Universe's strengthen can save photons from ever achieving yet another merchandise. we are speaking a destiny some 10^3 hundred years from now. the present age of the universe is barely a splash over 10^10 years. i think of element of the confusion is that many human beings think of Black holes are those vacuum cleaners that suck all the situation around them. it particularly is genuine that no merchandise can classically get away as quickly as interior a black hollow yet any merchandise can orbit a secure distance away with little possibility of falling in. If the sunlight have been now a black hollow, not one of the planets might ever fall in different than by using some disturbance exterior the photograph voltaic equipment, yet that has no longer something to do with the sunlight being a black hollow.

Answer 3

Not as much as whole, just a black hole

Answer 4

A planet that... uhh... well, no light can escape from it, and it sucks a nearby planet's dust [not the whole planet, unlike the movies]

Answer 5

Something from which nothing (not even light) can escape.

Answer 6

Isn't it just two black halves, stuck together? ;-)