Web Results
black hole
NOUN
1.
Astronomy. a theoretical massive object, formed at the beginning of the universe or by the gravitational collapse of a star exploding as a supernova, whose gravitational field is so intense that no electromagnetic radiation can escape.
Source: Dictionary.com
black hole | Define black hole at Dictionary.com
dictionary.reference.com/browse/black hole
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en.wikipedia.org/wiki/Black_hole

A black hole is a region of spacetime exhibiting such strong gravitational effects that ...... does not appear to carry any additional information about the matter that formed the black hole, meaning that this information appears to be gone forever.

www.nasa.gov/audience/forstudents/k-4/stories/nasa-knows/what-is-a-black-hole-k4.html

A black hole is a place in space where gravity pulls so much that even light cannot get out.

www.space.com/15421-black-holes-facts-formation-discovery-sdcmp.html

Apr 9, 2015 ... Black holes are some of the strangest and most mysterious objects in the universe. Billions ... Black Holes: Facts, Theory & Definition. By Nola ...

www.dictionary.com/browse/black-hole

Black hole definition, Astronomy. a theoretical massive object, formed at the beginning of the universe or by the gravitational collapse of a star exploding as a  ...

www.merriam-webster.com/dictionary/black%20hole

Define black hole: an invisible area in outer space with gravity so strong that light cannot get out of it — black hole in a sentence.

www.urbandictionary.com/define.php?term=black%20hole

Top definition ... A black hole is an inescapable point of space time. ... A black hole is a point of infinitely dense space with such a high density that no matter or  ...

www.theguardian.com/science/across-the-universe/2016/feb/01/what-is-a-black-hole-stephen-hawking-reith-lectures

Feb 1, 2016 ... Stephen Hawking has chosen black holes as the subject of his BBC Reith Lectures. Here's why these mysterious objects remain at the forefront ...

www.thefreedictionary.com/black+hole

A massive star in the last phase of its evolution, in which the star collapses, creating a volume of space-time with a gravitational field so intense that its escape ...