Difference between revisions 1813706 and 1814131 on enwikiversity

[[Image:Skylab-73-HC-440HR.jpg|thumb|right|200px|The Saturn V SA-513 lifts off to boost the Skylab Orbital Workshop into Earth orbit on March 14, 1973. Credit: NASA.]]
[[Astronomy]] is performed by location and is subject to local conditions. The shapes and sizes of observatories have changed over time, as have their altitude. The motivations for putting an observatory manned or unmanned at different altitudes has led to a great variety in '''lofting technology'''.
{{clear}}

(contracted; show full)

'''Def.''' an organization of knowledge for the practical purpose of propelling high into the air or above the air is called '''lofting technology'''.

==Observatories==
{{main|Astronomy/Observatories|Observatories}}
'''Def.''' "[a] place where stars, planets and other [[wikt:celestial body|celestial bodies]] are observed"<ref name=ObservatoryWikt>{{ cite web
|
title=observatory, In: ''Wiktionary''author=[[wikt:User:Paul G|Paul G]]
|title=observatory
|publisher=Wikimedia Foundation, Inc
|location=San Francisco, California
|month=October 16,19 March
|year=201204
|url=http://en.wiktionary.org/wiki/observatory
|accessdate=2012-12-05 }}</ref> is called an '''observatory'''.

==Horizontal coordinate system==
{{main|Coordinates/Horizontals|Horizontal coordinate systems}}
[[Image:Horizontal coordinate system 2.svg|thumb|right|200px|This diagram describes altitude and azimuth. Credit: Francisco Javier Blanco González.]]
The altitude of an entity in the sky is given by the angle of the arc from the local horizon to the entity.
(contracted; show full)[[Category:Astronomy learning projects/Lectures]]
[[Category:Astronomy/Lectures]]
[[Category:Astrophysics/Lectures]]
[[Category:History/Lectures]]
[[Category:Radiation astronomy/Lectures]]
[[Category:Resources last modified in February 2018]]
[[Category:Technology/Lectures]]
[[Category:Vehicles/Lectures]]