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Black hole - Wikipedia

en.wikipedia.org/wiki/Black_hole

A black hole is a region of spacetime exhibiting such strong gravitational effects that ..... from the ergosphere with more energy than they entered. This energy is taken from the rotational energy ...

What Is a Black Hole? | NASA

www.nasa.gov/audience/forstudents/5-8/features/nasa-knows/what-is-a-black-hole-58.html

Stellar black holes form when the center of a very massive star collapses in upon itself. This collapse also causes a supernova, or an exploding star, that blasts ...

Black Holes | Science Mission Directorate

science.nasa.gov/astrophysics/focus-areas/black-holes

Don't let the name fool you: a black hole is anything but empty space. ... Intense X -ray flares thought to be caused by a black hole devouring a star. (Video).

What causes a black hole to form?

www.houghtonmifflinbooks.com/booksellers/press_release/studentscience/quiz/13a.shtml

Answer: D (a large star's core collapses to become so dense that its gravitational pull keeps light from escaping) black hole An extremely dense celestial object ...

How is a black hole created? - Hubble Space Telescope

hubblesite.org/reference_desk/faq/answer.php.id=56&cat=exotic

A common type of black hole is produced by certain dying stars. A star with a mass greater than about 20 times the mass of our Sun may produce a black hole at ...

www.ask.com/youtube?q=What Causes Black Holes?&v=8grTbzAo0PA
Nov 20, 2012 ... Some stars are even bigger than that, causing the birth of black holes. The spectacular scenes of a this birth have been observed many times ...

Creation of Black Holes - Black Holes and Wormholes - The Physics ...

www.physicsoftheuniverse.com/topics_blackholes_blackholes.html

The ripples in space-time caused by two black holes orbiting around each other - typically in a three-leaved clover shape or more complex multi-pass ...

Can anything ever escape from a black hole? - Articles - StarDate's ...

blackholes.stardate.org/resources/faqs/escape-from-black-hole.html

Nothing that falls into a black hole can come back out again -- at least not in its ... loss could become substantial enough to cause the black hole to vaporize.

BBC Universe - Black holes: How is a waterfall like a black hole?

www.bbc.co.uk/science/space/universe/sights/black_holes

Supermassive black holes may have formed when huge clouds of interstellar gas collapsed, but this is not certain. ... What causes black holes? Gamma rays ...

Black Holes: Facts - Space.com

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 ... effects would cause the event horizon to act much like a wall of fire, ...