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    Astronomy Study Set 1
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    Exam 18: Our Expanding Universe
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    Astronomers Have Known That Galaxies Are Separate Entities Outside of Our
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Astronomers Have Known That Galaxies Are Separate Entities Outside of Our

Question 32

Question 32

Multiple Choice

Astronomers have known that galaxies are separate entities outside of our own for roughly the last


A) 30 years.
B) 90 years.
C) 150 years.
D) 300 years.

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