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Q22: Which group represents stars of the smallest
Q26: Our Sun is a star of spectral
Q30: Suppose a scientist holds a press conference
Q42: A star with a parallax angle of
Q48: The temperature variations of the cosmic microwave
Q49: Based on the number of galaxies visible
Q60: If we say that a galaxy has
Q73: How do we determine the conditions that
Q75: Based on inventoried matter in the universe,including
Q95: Does Hubble's law work well for galaxies