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The top documents tagged [time astronomers]
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time astronomers
HST Observations of the Earliest Galaxies. Expansion of the Universe 1912 Edwin Hubble discovered that a galaxy’s recessional velocity Vr is proportional.
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Astronomy Chapter Nineteen: Galaxies and the Universe 19.1 Tools of Astronomers 19.2 Stars 19.3 Galaxies and the Universe.
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28.1 Astronomical distances Astronomers have developed units other than kilometers or meters to measure the vast distances in space. One light year.
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