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Crater
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Meteor Crater, Arizona Rabe Crater Crater Lake, Oregon Large blue lake surrounded by forested hills. heavily cratered region of Callisto sand dunes on Mars Mars: Yuty Crater Mercury: double-ringed crater Mercury Mercury: Vivaldi Crater
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Meteor Crater, Arizona
Meteor Crater, Arizona Aerial view of Meteor Crater, Arizona.

Crater

geology
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Rabe Crater
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Rabe CraterPart of the floor of Rabe Crater, a large impact crater in Mars's southern highlands, photographed October 24, 2007.
Crater Lake, Oregon
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Crater Lake, Oregon

Crater, circular depression in the surface of a planetary body. Most craters are the result of impacts of meteorites or of volcanic explosions. Meteorite craters are more common on the Moon and Mars and on other planets and natural satellites than on Earth, because most meteorites either burn up in Earth’s atmosphere before reaching its surface or erosion soon obscures the impact site. Craters made by exploding volcanoes (e.g., Crater Lake, Oregon) are more common on Earth than on the Moon, Mars, or Jupiter’s moon Io, where they have also been identified.

The Editors of Encyclopaedia BritannicaThis article was most recently revised and updated by Alison Eldridge.