Difference between revisions 1900979 and 1900980 on enwikiversity

< previous diff
next diff >
Astronomy/Craters
[[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.

(contracted; show full)te book|last=Moore|first=Jeffrey M., Chapman, Clark R.; Bierhaus, Edward B. et al. |title=Callisto, In: ''Jupiter: The planet, Satellites and Magnetosphere''|date=2004|publisher=Cambridge University Press|editor=Bagenal, F.; Dowling, T.E.; McKinnon, W.B.| url=http://lasp.colorado.edu/~espoclass/homework/5830_2008_homework/Ch17.pdf }}</ref>

Many fresh impact craters like Lofn also show enrichment in carbon dioxide.<ref name=Hibbitts1998>{{ cite book|last=Hibbitts |first=C.A.
|coauthors=, McCord, T. B.; Hansen, G.B.|title=Distributions of CO<sub>2</sub> and SO<sub>2</sub> on the Surface of Callisto|date=1998|publisher=Lunar and Planetary Science XXXI|url=http://www.lpi.usra.edu/meetings/lpsc2000/pdf/1908.pdf|page=1908 }}</ref>

(contracted; show full)ic Map of Callisto JC 15M CMN |publisher=U.S. Geological Survey |edition=2002 |url=http://geopubs.wr.usgs.gov/i-map/i2770/}}</ref> The second largest is Asgard, measuring about 1,600&nbsp;kilometers in diameter.<ref name="Map 2002"/> Multi-ring structures probably originated as a result of a post-impact concentric fracturing of the lithosphere lying on a layer of soft or liquid material, possibly an ocean.<ref name=Klemaszewski2001>{{ cite book|last= Klemaszewski|first= J.A.
|coauthors=, Greeley, R.|title= Geological Evidence for an Ocean on Callisto |date=2001|publisher=Lunar and Planetary Science XXXI|page=1818|url=http://www.lpi.usra.edu/meetings/lpsc2001/pdf/1818.pdf }}</ref> The catenae&mdash;for example Gomul Catena&mdash;are long chains of impact craters lined up in straight lines across the surface. They were probably created by objects that were tidally disrupted as they passed close to Jupiter prior to the impact on Callisto, or by very oblique impacts.<ref name=(contracted; show full)[[Category:Astrophysics/Lectures]]
[[Category:Earth sciences/Lectures]]
[[Category:Geography/Lectures]]
[[Category:Geology/Lectures]]
[[Category:Materials sciences/Lectures]]
[[Category:Planetary sciences/Lectures]]
[[Category:Resources last modified in July 2018]]
[[Category:Technology/Lectures]]