expanding universe

expanding universe

noun Astronomy.
a concept or representation of the universe, based on the observed redshifts of distant galaxies, in which the galaxies are assumed to be receding from each other at a speed proportional to their separation as a result of the expansion of the universe.
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Expanding universe is always a great word to know.
So is crescent. Does it mean:
the Ram, a zodiacal constellation between Pisces and Taurus
the figure of the moon in its first or last quarter, resembling a segment of a ring tapering to points at the ends
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