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Considering only the role of dark matter and keeping all other factors the same, which hypothetical universe is oldest?
Q11: Suppose you lived on the Moon. Which
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Q30: The quantity called the "enclosed mass" M(<r)represents
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Q61: What defines the habitable zone around a
Q88: Compared to the critical density of matter,
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Q101: RXJ1800, a galaxy, lies very near in
Q102: Which of the following statements about scientific
Q121: In addition to the conditions required for