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Who first showed that the recessional speeds of galaxies increase with increasing distance from Earth?
Q13: A spiral galaxy with a bright, starlike
Q17: What would the age of the universe
Q53: An active galaxy is measured to be
Q55: In principle, if astronomers were in the
Q99: The Milky Way Galaxy and the Andromeda
Q143: The Tully-Fisher relation can be used to
Q144: X-rays that come from the vicinity of
Q177: Can a white dwarf explode?<br>A) Yes, but
Q207: A spiral galaxy has well-defined arms that
Q209: Which force induces the core to contract