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Aristarchus (crater)

crater Aristachus on the Moon
Aristarchus is a conspicuous lunar crater, about 45 km (28 miles) in diameter and 3.7 km (2.3 miles), surrounded by a system of bright rays, which has been the reported site of transient lunar phenomena in the form of reddish glows. Aristarchus lies on the northwest part of the near side of the Moon. It is bright enough to be visible to the naked eye.

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