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Image Attributions:
Hubble Team Unveils Most Colorful View of Universe Captured by Space Telescope (https://www.flickr.com/photos/gsfc/14159153437/) - NASA Goddard Photo and Video - License: Attribution (http://creativecommons.org/licenses/by/2.0/)
BLACK HOLE
A black hole is an area of space where the gravity is so strong that even light cannot escape. This is caused when a large amount of matter occupies a small space.