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Impact craters are omnipresent at the surface of the Moon. Eratosthenes is a crater on the Earth facing side, about 58 km (36 mi) in diameter and 3.4 km (2.1 mi) deep. It is named after the Greek philosopher who estimated the circumference of the Earth with remarkable accuracy around 240 BCE. In the centre of the crater is a mountain. This image shows the summit of this central peak, a few hundred meters wide, during local sunrise.

CREDIT: NASA/GSFC/Arizona State University.