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Tsync Tsync
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Posts: 3450
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8 years ago
There are no X-ray telescopes on Earth because:
A) they are too expensive to build.
B) no one has yet invented an X-ray telescope that works.
C) X-rays don't penetrate Earth's atmosphere.
D) we can't figure out how to direct an X-ray beam through space.
E) there are no astronomical objects that emit X-rays.
Textbook 
Astronomy Today

Astronomy Today


Edition: 8th
Authors:
Read 120 times
3 Replies
Minoring in physics
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RatatouilleRatatouille
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Posts: 3710
8 years ago
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Tsync Author
wrote...
8 years ago
Exactly what I needed Smiling Face with Open Mouth
Minoring in physics
wrote...
8 years ago
Happy to help Slight Smile
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