Difference between revisions 1559781 and 1582141 on enwikiversity

[[Image:Brorfelde Schmidt Telescope.jpg|thumb|right|200px|The Schmidt Telescope at the former Brorfelde Observatory is now used by amateur astronomers. Credit: [[commons:User:Moeng|Mogens Engelund]].]]
A '''radiation telescope''' is an instrument designed to collect and focus radiation so as to make distant sources appear nearer.
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==[[Astronomy]]==
[[Image:Mauna Kea observatory.jpg|thumb|left|200px|Sunset over four telescopes of the [[w:Mauna Kea Observatories|Mauna Kea Observatories]] is pictured, from left to right: the [[w:Subaru Telescope|Subaru Telescope]], the twin [[w:W. M. Keck Observatory|Keck I and II telescope]]s, and the [[w:NASA Infrared Telescope Facility|NASA Infrared Telescope Facility]]. Credit: [http://flickr.com/photos/35188692@N00 Alan L].]]
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|title=Mauna Kea Telescopes
|url=http://www.ifa.hawaii.edu/mko/telescope_table.shtml
|publisher=Institute for Astronomy – University of Hawaii
|accessdate=August 29, 2010 }}</ref>"<ref name=MaunaKea/>
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==
[[Radiation]]==

“In physics, radiation is a process in which energetic particles or energetic waves travel through a medium or space.”<ref name=Radiation>{{ cite web
|title=Radiation, In: ''Wikipedia''
|publisher=Wikimedia Foundation, Inc
|location=San Francisco, California
|month=May 31,
|year=2012
|url=http://en.wikipedia.org/wiki/Radiation
|accessdate=2012-06-02 }}</ref>

'''Def.''' an action or process of throwing or sending out a traveling ray in a line, beam, or stream of small cross section is called '''radiation'''.

'''Def.''' “[t]he shooting forth of anything from a point or surface, like the diverging rays of light; as, the radiation of heat”<ref name=RadiationWikt>{{ cite web
|title=radiation, In: ''Wiktionary''
|publisher=Wikimedia Foundation, Inc
|location=San Francisco, California
|month=June 24,
|year=2012
|url=http://en.wiktionary.org/wiki/radiation
|accessdate=2012-07-07 }}</ref> is called '''radiation'''.
(contracted; show full)|year=2013
|url=https://en.wikipedia.org/wiki/Liquid_mirror_telescope
|accessdate=2014-01-03 }}</ref>

A "telescope with a liquid metal mirror can only be used [as a] zenith telescope that looks straight up".<ref name=LiquidMirrorTelescope/>
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==
[[Instruments/Telescopes/Hydrogens|Hydrogen telescopes]]==
[[Image:Solarborg.jpg|right|thumb|200px|Here is an example of an amateur solar telescope equipped with a hydrogen-alpha filter system. Credit: .]]
"In the field of [[amateur astronomy]] ... Amateurs use ... hydrogen-alpha filter systems".<ref name=SolarTelescope>{{ cite web
|title=Solar telescope, In: ''Wikipedia''
|publisher=Wikimedia Foundation, Inc
|location=San Francisco, California
|month=December 30,
|year=2013
|url=https://en.wikipedia.org/wiki/Solar_telescope
|accessdate=2014-01-03 }}</ref>
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==[[Chemicals/Alloys|Alloys]]/>
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==Alloys==
[[Image:Cloudcroft Observatory.jpg|thumb|right|200px|The image shows the dome of the NASA Orbital Debris Observatory near Cloudcroft, New Mexico. Credit: NASA.]]
[[Image:CCD_Debris_Telescope.png|thumb|left|200px|This image shows the CCD Debris Telescope that is under the NODO dome. Credit: ]]
(contracted; show full)|location=San Francisco, California
|month=April 26,
|year=2013
|url=http://en.wikipedia.org/wiki/2007_Carancas_impact_event
|accessdate=2013-05-12 }}</ref>
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==
[[Astronomy/Observatories/Shelters|Shelters]]Shelters==

"Telescope domes have a slit or other opening in the roof that can be opened during observing, and closed when the telescope is not in use. In most cases, the entire upper portion of the telescope dome can be rotated to allow the instrument to observe different sections of the night sky. Radio telescopes usually do not have domes."<ref name=Observatory>{{ cite web
|title=Observatory, In: ''Wikipedia''
|publisher=Wikimedia Foundation, Inc
|location=San Francisco, California
|month=January 26,
|year=2013
|url=http://en.wikipedia.org/wiki/Observatory
|accessdate=2013-02-05 }}</ref>

==[[Radiation astronomy/Spectroscopy|Spectroscopy]]/>

==Spectroscopy==

"'''Astronomical spectroscopy''' is the technique of [[w:spectroscopy|spectroscopy]] used in [[astronomy]]. The object of study is the [[w:electromagnetic spectrum|spectrum]] of [[w:electromagnetic radiation|electromagnetic radiation]], including visible light, which [[w:radiant energy|radiates]] from [[w:star|star]]s and other celestial objects.   Spectroscopy can be used to derive many properties of distant stars and galaxies, such as their chemical composition, but also their motion by [[w:Doppler shift|Doppler shift]] measurements."<ref name=AstronomicalSpectroscopy>{{ cite web
|title=Astronomical spectroscopy, In: ''Wikipedia''
|publisher=Wikimedia Foundation, Inc
|location=San Francisco, California
|month=December 8,
|year=2012
|url=http://en.wikipedia.org/wiki/Astronomical_spectroscopy
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