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Astronomy Picture of the Day

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

See Explanation. Clicking on the picture will download the highest resolution version available.

Crater Copernicus

Explanation: One of the more prominent craters on the Moon is named Copernicus . Copernicus is a large young crater visible with binoculars slightly northwest of the center of the Moon's Earth-facing hemisphere . Copernicus is distinguished by its size and by the many bright rays pointing out from it. Although Copernicus is relatively young for a lunar crater, it was formed nearly a billion years ago by a colossal impact . The center of Copernicus is about 93 kilometers across. The above picture was taken in 1972 by the last human mission to the moon: Apollo 17 . The prospects for a return have been boosted recently with increased evidence of ice deposits near the lunar poles .

Date May 13, 2001
Credit Credit: Apollo 17 Crew , NASA
Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
A service of: ASD at NASA / GSFC,
NASA Science Activation & Michigan Tech. U.