Multiple Choice
What do we mean when we say that the universe is expanding?
A) Within galaxies, average distances between star systems are increasing with time.
B) Everything in the universe is gradually growing in size.
C) The statement is not meant to be literal; rather, it means that our knowledge of the universe is growing.
D) Average distances between galaxies are increasing with time.
Correct Answer:
Verified
Correct Answer:
Verified
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