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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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==Mercury==
{{main|Keynote lectures/Mercury}}
[[Image:Mercury Globe-MESSENGER mosaic centered at 0degN-0degE.jpg|thumb|right|250px|This is a composite image of Mercury taken by the MESSENGER probe. Credit: .]]
[[Image:Mariner 10.jpg|thumb|left|250px|Mariner&nbsp;10 is the first probe to visit the innermost planet (1974–75). Credit: .]]
{{multiple image
| align = 
leftcenter
| direction = horizontal
| width = 2360
| image1 = Caloris basin labeled.png
| caption1 = Mercury's Caloris Basin is one of the largest impact features in the Solar System
| image2 = Mercury weird terrain.jpg
| caption2 = The so-called "Weird Terrain" was formed at the point antipodal to the Caloris Basin impact
}}
[[Image:Stevenson crater (MESSENGER).png|thumb|right|250px|This is a MESSENGER image of catena on Mercury. Credit: NASA, JPL, APL (Jet Propulsion Laboratory).]]
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[[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]]