Difference between revisions 1241130 and 1248729 on enwikiversity

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Crater astronomy
[[Image:Chain of impact craters on Ganymede.jpg|thumb|right|200px|The image shows a chain of craters on Ganymede. Credit: Galileo Project, Brown University, JPL, NASA.]]
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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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(contracted; show full)|location=San Francisco, California
|month=May 22,
|year=2012
|url=http://en.wikipedia.org/wiki/Planetary_geology
|accessdate=2012-05-23 }}</ref>
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=Colors=⏎
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=Minerals=
[[Image:LvMS-Lvm.jpg|thumb|left|200px|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]].]]
[[Image:820qtz.jpg|thumb|left|200px|This is a thin section with cross-polarized kight through a sand-sized quartz grain of 0.13 mm diameter. Credit: Glen A. Izett, USGS.]]
(contracted; show full)|location=San Francisco, California
|month=June 9,
|year=2012
|url=http://en.wikipedia.org/wiki/April_1959
|accessdate=2012-06-12 }}</ref>
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=Weak forces=⏎
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=Continuum=

"Croft [3] called moat craters anomalous pit craters and also suggested a continuum between moat craters, craters, and palimpsests, even though morphometrically they appeared to be distinct."<ref name=Lucchitta>{{ cite journal
|author=B.K. Lucchitta and H.M. Ferguson
|title=Ganymede: "Moat" Craters Compared with Palimpsests and Basins
|journal=Abstracts of the Lunar and Planetary Science Conference
|month=March
|year=1988
(contracted; show full)t; ergs. The oblique impacts produce craters 2 to 10 m across with morphologies and ejecta that are bilaterally symmetrical with respect to the plane of the missile trajectory. Rims are high and the amount of ejecta large in down-trajectory and lateral directions, whereas rims are low to nonexistent and ejecta thin to absent up-trajectory. Symmetry development and modifications of the symmetry are a function of target material, local topography, and angle of impact."<ref name=Moore/>
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=Background=

=Meteors=

=Cosmic rays=

=Neutrals=

=Subatomics=

=Neutrons=

=Protons=

=Mesons=

=Beta particles=

=Electrons=

=Positrons=

=Muons=

=Neutrinos=

=Gamma rays=

=X-rays=

=Ultraviolets=

=Opticals=

=Visuals=

=Violets=

=Blues=

=Cyans=

=Greens=

=Yellows=

=Oranges=

=Reds=

=Infrareds=

=Submillimeters=

=Microwaves=

=Radars=

=Radios=

=Superluminals=

=Plasma objects=

=Gaseous objects=

=Liquid objects=

=Rocky objects=

=Astrochemistry=

=Hydrogen=

=Helium=

=Lithium=

=Beryllium=

=Boron=

=Carbon=

=Nitrogen=

=Oxygen=

=Fluorine=

=Neon=

=Ions=

=Compounds=

=Alloys=

=Atmospheres=

=Materials=

=Meteorites=

=Shelters=

=Spectroscopy=

=Spectrometers=

=Planetary astronomy=⏎
⏎
=Mercury=
[[Image:Mercury Globe-MESSENGER mosaic centered at 0degN-0degE.jpg|thumb|right|200px|This is a composite image of Mercury taken by the MESSENGER probe. Credit: .]]
[[Image:Mariner 10.jpg|thumb|left|200px|Mariner&nbsp;10 is the first probe to visit the innermost planet (1974–75). Credit: .]]
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| align = left
| direction = horizontal
| width = 230
| image1 = Caloris basin labeled.png
(contracted; show full)|location=San Francisco, California
|month=November 15,
|year=2012
|url=http://en.wikipedia.org/wiki/Deep_Impact_(spacecraft)
|accessdate=2012-12-05 }}</ref>
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=Geography=

=Locations on Earth=

=Extreme locations=

=History=

=Prehistory=

=Ancient history=

=Early history=

=Classical history=

=Recent history=

=Mathematics=

=Physics=

=Science=

=Technology=⏎
⏎
=See also=
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* [[Meteor astronomy]]
* [[Meteorites]]
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=References=
{{reflist|2}}
(contracted; show full)* [http://www.springerlink.com/ SpringerLink]
* [http://www.tandfonline.com/ Taylor & Francis Online]
* [http://heasarc.gsfc.nasa.gov/cgi-bin/Tools/convcoord/convcoord.pl  Universal coordinate converter]
* [http://onlinelibrary.wiley.com/advanced/search Wiley Online Library Advanced Search]
* [http://search.yahoo.com/web/advanced Yahoo Advanced Web Search]

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{{Sisterlinks|Crater astronomy}}

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