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Draft:Craters by radiation
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[[Image:Chain of impact craters on Ganymede.jpg|thumb|right|250px|The image shows a chain of craters on Ganymede. Credit: Galileo Project, Brown University, JPL, NASA.]]
A '''crater''' may be any large, roughly circular, depression or hole in or beneath the rocky surface of a rocky object.

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==Sources==
{{main|Radiation astronomy/Sources|Radiation astronomy sources|Sources}}
[[Image:Mount Tambora Volcano, Sumbawa Island, Indonesia.jpg|thumb|right|250px|This detailed astronaut photograph depicts the summit caldera of the Mount Tambora. Credit: NASA ISS Expedition 20 crew.]]

[[Image:Santa Ana Volcano.USAF.C-130.3.jpg|right|thumb|250px|The crater in Santa Ana Volcano is photographed from a United States Air Force C-130 Hercules flying above El Salvador. Credit: .]]
[[Image:Karthala volcano-Comoros.jpg|thumb|left|250px|The view is into Karthala volcano crater in November 2006 at the solidified lava lake Credit: alKomor.com.]]
[[Image:SP Crater.jpg|thumb|right|250px|S P Crater is a cinder cone volcano in the San Francisco volcanic field. Credit: .]]
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