Difference between revisions 2249030 and 2399953 on enwikiversity

[[Image:Brorfelde Schmidt Telescope.jpg|thumb|right|250px|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==
{{main|Keynote lectures/Astronomy}}
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'''Def.''' any instrument used in [[Astronomy/Keynote lecture|astronomy]] for observing distant objects (such as a radio telescope) is called a '''telescope''', or an '''astronomical telescope'''.
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==Aerial telescopes==
{{main|Radiation astronomy/Telescopes/Aerial|Aerial Telescopes}}
[[Image:
Huygens Aerial  telescope, 1684.jpg|thumb|right|250px|An engraving of Huygens 210-foot aerial telescope showing the eyepiece and objective mounts and connecting string. Credit: .]]
An '''aerial telescope''' is a type of very-long-focal-length [[w:refracting telescope|refracting telescope]] built in the second half of the 17th century that did not use a tube.<ref name=Rice>{{ cite book
|title=The Telescope
|url=http://galileo.rice.edu/sci/instruments/telescope.html
|publisher=The Galileo Project
(contracted; show full){{tlx|Radiation astronomy resources}}{{Principles of radiation astronomy}}{{tlx|Technology resources}}{{Sisterlinks|Radiation telescopes}}
{{Sisterlinks|Telescopes}}

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[[Category:Instruments/Lectures]]
[[Category:Materials sciences/Lectures]]
[[Category:Radiation astronomy/Lectures]]
[[Category:Technology/Lectures]]