aristarchus


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  1. of Samos.late 3rd century b.c., Greek astronomer.
  2. of Samothrace.c216–144 b.c., Greek philologist and critic.
  3. an extremely bright crater in the second quadrant of the face of the moon: about 29 miles (47 km) in diameter from crest to crest.

noun

  1. a crater in the NE quadrant of the moon, having a diameter of about 37 kilometres, which is the brightest formation on the moon
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