Difference between revisions 2117892 and 2117893 on enwikiversity

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Keynote lectures/Craters by radiation
[[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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{{main|Planets/Geology|Planetary geology}}
[[Image:Moon-apollo17-schmitt boulder.jpg|thumb|right|250px|Planetary geologist and NASA astronaut Harrison "Jack" Schmitt collects lunar samples during the Apollo 17 mission. Credit: NASA.]]
'''Planetary geology''', '''astrogeology''' or '''exogeology''', is a [[planetary science]] concerned with the [[geology]] of celestial bodies such as the planets and their 
[[Moon/Keynote lecture|moon]]s, asteroids, comets, and [[meteorites]]. It includes determining the internal structure of the terrestrial planets, planetary volcanism and surface processes such as impact craters, fluvial and aeolian processes.
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==Minerals==
{{main|Minerals}}
[[Image:LvMS-Lvm.jpg|thumb|left|250px|The photomicrographs show of a sand grain held in an amorphous matrix, in plane-polarized light on top, cross-polarized light on bottom. Scale box in mm. Credit: [[w:User:Qfl247|Qfl247]].]]
(contracted; show full)[[Category:Earth sciences/Lectures]]
[[Category:Geography/Lectures]]
[[Category:Geology/Lectures]]
[[Category:Materials sciences/Lectures]]
[[Category:Planetary sciences/Lectures]]
[[Category:Radiation/Lectures]]
[[Category:Radiation astronomy/Lectures]]
[[Category:Resources last modified in November 2018]]