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If a black hole is not a hole, then what is it? Readers will find out what black holes are, what causes them, and how scientists first discovered them. They'll also earn how astronomers find black holes, get to know our nearest black-hole neighbor, and take a journey that will s-t-r-e-t-c-h the mind.
If a black hole is not a hole, then what is it? Readers will find out what black holes are, what causes them, and how scientists first discovered them. They'll also earn how astronomers find black holes, get to know our nearest black-hole neighbor, and take a journey that will s-t-r-e-t-c-h the mind.
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