Analyzing Descriptions in A Black Hole Is NOT a Hole
Quiz
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Why does the author include this description?
Read this excerpt from A Black Hole Is NOT a Hole.
One of the best black-hole clues is X-ray Shergy. As
matter approaches an event horizon, its atoms "shine"
with invisible X-rays. Although our eyes can't see the X-
rays, we can make detectors that respond to their
tremendous energy.
X-ray-catching telescopes make pictures of otherwise
invisible X-rays. The pictures reveal that certain areas in
outer space are emitting intense X-rays. Each bright
location points out where something extraordinary is
going on. It is a hint that a black hole might be there.
to explain why humans cannot see X-rays
to explain how X-rays help scientists study space
to explain that black holes are extraordinary
O to explain where black holes are located
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