The spectra of interstellar gas clouds show that they have the same basic composition as
A) Earth's atmosphere.
B) stars.
C) asteroids.
D) interstellar dust.
E) the Martian polar caps.
B
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If you went to Mars, would you have to wear a space suit? Explain why or why not
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It is not necessary to separate metals from paper in the feedstock for a MSW energy plant
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What was the first evidence that quasars were different from astronomical objects before they were observed in visual wavelengths?
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