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.
• MOON TOPICS