Difference between revisions 2117695 and 2117890 on enwikiversity

[[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.

'''Crater astronomy''' applies the techniques of astronomy to the apparent craters observed on rocky objects in an effort to understand what they are, when they occurred, and their importance to rocky objects.
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==Astronomy==
{{main|Keynote lectures/Astronomy}}
When any effort to acquire a system of laws or knowledge focusing on an ''astr'', ''aster'', or ''astro'', that is, any natural body in the sky especially at night,<ref name=Gove>{{ cite book
|author=
|title=Webster's Seventh New Collegiate Dictionary
|publisher=G. & C. Merriam Company
|location=Springfield, Massachusetts
|date=1963
|editor=Philip B. Gove
|pages=1221
|bibcode=
|doi=
|pmid=
|isbn=
|accessdate=2011-08-26 }}</ref> succeeds in discovering or exploring craters even in its smallest [[Special:Search |measurement]], '''crater astronomy''' is the name of the effort and the result. Once an entity, source, or object has been detected as having craters, it may be necessary to determine what the mechanism is. Usually this information provides understanding of the same entity, source, or object. Craters suggests a violent event. The formation of craters on Earth may be associated with the sense of seeing as much as hearing, what can be termed [[acoustic astronomy]]. As telescope optics transmit visual light well, [[visual astronomy]] is a field associated with crater astronomy.

For crater astronomy, the proof of concept is demonstrated by unique or novel [[Astronomy/Keynote lectures/Astronomy|astronomy]] in any band that explores craters to reveal knowledge, especially regarding their formation.

==Radiation==
{{main|Radiation/Keynote lecture}}
Radiation that may produce a crater is likely larger than subatomic particles. The range of size and composition of this radiation is large. Such radiation may be rocky, liquid, gaseous, or plasma, a moving galaxy cluster, down to the size of an atom, molecule, or dust.

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[[Category:Resources last modified in November 2018]]