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en.wikipedia.org/wiki/Black_hole

A black hole is a region of spacetime exhibiting such strong gravitational effects that ..... On the other hand, indestructible observers falling into a black hole do not notice any of these effects as they cross the event horizon. According to their own  ...

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

Black holes can come in a range of sizes, but there are three main types of black ... Black holes do not wander around the universe, randomly swallowing worlds.

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 the end of its life. In the normal ... Next question: Do all stars become black holes?

www.ask.com/youtube?q=Where+Do+Black+Holes+Come+From%3F&v=8grTbzAo0PA
Nov 20, 2012 ... Black holes are created when a large star collapses under the force of gravity having run out of ... i have a question.. how do we know this.

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

1 day ago ... Black holes are some of the strangest and most mysterious objects in the universe. ... though your death would come before you reached singularity. ... Black Hole Quiz: How Well Do You Know Nature's Weirdest Creations?

www.physicsoftheuniverse.com/topics_blackholes_blackholes.html

Having said that, black holes can grow to great size over time as they assimilate more and more matter and even other black holes, and some do become ...

minerva.union.edu/vianil/web_stuff2/How_are_Black_Holes_Formed.htm

Small Stars Do Not Create Black Holes: When Smaller Stars "Die" They Become ... Black Holes come into existence when the atomic and nuclear forces within a ...

www.skyandtelescope.com/astronomy-resources/how-do-black-holes-form

Jul 22, 2014 ... Black holes are some of the most exotic, intriguing objects in the ... There are a couple of answers to the question, "How do black holes form?

scienceblogs.com/startswithabang/2012/07/30/where-do-supermassive-black-holes-come-from

Jul 30, 2012 ...Black holes, which have no memory, are said to contain the earliest memories of the universe, and the most recent, too, while at the same time ...