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An infinite universe is one of the assumptions of the cosmological principle.
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Q26: What is one of the differences between
Q28: The central star of the Crab Nebula
Q37: Giant elliptical galaxies may be the result
Q64: The period from about 100 seconds up
Q79: The first probe carrying mankind's message to
Q86: Why is the post-Main Sequence structure of
Q89: Distant galaxies tend to be much bluer
Q95: Which of the following was a way
Q107: Collectively,electrons,muons,and neutrinos are called:<br>A) hadrons.<br>B) baryons.<br>C) photons.<br>D)