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www.ask.com/science/black-holes-made-4dc57befff920a32

A black hole is not, strictly, made of anything in the conventional sense. Black holes are so exotic that they defy commonsense ideas about matter. While an object such as Earth ca...

A research vessel finds a missing ship, commanded by a mysterious scientist, on the edge of a black hole... More>>
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Black hole

en.wikipedia.org/wiki/Black_hole

A black hole is a geometrically defined region of spacetime exhibiting such strong gravitational effects that nothing—including particles and electromagnetic  ...

What Is a Black Hole? | NASA

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.

physics.about.com/od/astronomy/f/BlackHole.htm
Y observes idealized clocks on X slowing down, freezing in time when X hits r Y observes light from X redshift, reaching infinity at r (thus X becomes invisible - yet somehow we can still see their clocks. The collapse would seem to slow down, actually freezing in time... More »
By Andrew Zimmerman Jones, About.com Guide

Black Holes - NASA Science - Science@NASA

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

Oct 14, 2015 ... Don't let the name fool you: a black hole is anything but empty space. Rather, it is a great amount of matter packed into a very small area - think ...

What is a Black Hole? | Black Hole Facts, Theory & Definition

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 of them may exist in the Milky Way alone. But what ...

BLACK HOLES by Ted Bunn - Berkeley Cosmology Group

cfpa.berkeley.edu/Education/BHfaq.html

Answers to black hole questions like "How big is a black hole?" ,"How do black holes evaporate?", and "What is a wormhole?".

HubbleSite: Black Holes: Gravity's Relentless Pull

hubblesite.org/explore_astronomy/black_holes/

Black Holes: Gravity's Relentless Pull. Information, virtual journeys, and simulations about black holes from the Space Telescope Science Institute.

HubbleSite: Black Holes: Gravity's Relentless Pull

hubblesite.org/explore_astronomy/black_holes/home.html

Black holes are places where ordinary gravity has become so extreme that it overwhelms all other forces in the Universe. Once inside, nothing can escape a ...

Popular Q&A
Q: How to Paint a Black Hole.
A: 1. Study images of the different types of black holes we know exist. Use whatever drawings and images you can find to establish a concept for your drawing. Choo... Read More »
Source: www.ehow.com
Q: How to Understand Black Holes.
A: 1. Black holes are a direct consequence of the theory of general relativity. According to Einstein's theory of relativity, any massive object warps the four-dim... Read More »
Source: www.ehow.com
Q: How are black holes born?
A: A normal star is stable because the radiation pressure generated from its fusion reaction exactly cancels the gravitational force which wants to collapse the st... Read More »
Source: www.quora.com
Q: WHAT ARE BLACK HOLES?
A: As most of you are aware BLACK HOLE is a region of space in which the gravitational field is so powerful that nothing, not even electromagnetic radiation can es... Read More »
Source: www.quora.com
Q: What is the length of a black hole?
A: Zero. Read More »
Source: wiki.answers.com