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Publisher's Summary

If a black hole is not a hole, then what is it? Find out what black holes are, what causes them, and how scientists first discovered them. Learn how astronomers find black holes, get to know our nearest black-hole neighbor, and take a journey that will literally s-t-r-e-t-c-h the mind.
Includes a Bonus PDF of illustrations and photographs from the Book.
©2013 Carolyn Cinami DeCristofano (P)2013 Listeining Library
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