Difference between revisions 2109482 and 2170985 on enwikiversity

[[Image:Skylab-73-HC-440HR.jpg|thumb|right|250px|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'''.
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==Sun-synchronous orbital rocketry==
{{main|Rocketry/Sun-synchronous|Sun-synchronous orbital rocketry}}
[[Image:Heliosynchronous Orbit.png|thumb|right|250px|Diagram shows the orientation of a Sun-synchronous orbit (green) in four points of the year. A non-sun-synchronous orbit (magenta) is also shown for reference. Credit: [[commons:User:Brandir|Brandir]].]]
[[Image:ERS 2.jpg|thumb|left|250px|The photograph shows a full-size model of ERS-2. Credit:Poppy.]]
[[Image:Ariane42P rocket.
gifpng|thumb|right|250px|The ERS-2 is carried into a sun-synchronous polar orbit by an Ariane 4 similar to the one imaged. Credit: NASA.]]
[[Image:Launch of ESSA 9 Spac0044.jpg|left|thumb|250px|A night launch of meteorological satellite ESSA 9 is imaged on a Delta E1. Credit: [http://www.photolib.noaa.gov/ NOAA Photo Library].{{tlx|free media}}]]
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[[Category:Astrophysics/Lectures]]
[[Category:History/Lectures]]
[[Category:Radiation astronomy/Lectures]]
[[Category:Resources last modified in December 2019]]
[[Category:Technology/Lectures]]
[[Category:Vehicles/Lectures]]
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