Earth photos

Seas and mountains. The moon satellite

Seas and mountains. The moon satellite

This striking image of the waning quarter moon was recorded with a 24-inch telescope and a digital camera. Wonderfully detailed, especially along the "terminator" or shadow line between lunar night and day, this cropped version of the full image shows the northern polar region with its craters and the smooth and vast Mare Imbrium.

Since the Renaissance, telescopes have revealed numerous details of the lunar surface, and spacecraft have contributed greatly to this knowledge. Among the orographic accidents are craters, mountain chains, plains or seas, fractures, tops, lunar fissures and radii or "rays."

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Crack in the moonPlum crater
Album: Photos of the Earth and the Moon Gallery: The Moon satellite