A Black Hole is Not a Hole

A Black Hole is Not a Hole

By Carolyn Cinami DeCristofano
Unabridged
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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.