Difference between revisions 1813694 and 1813695 on enwikiversity

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Lofting technology
[[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'''.
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|url=http://abyss.uoregon.edu/~js/ast121/lectures/lec03.html
|title=Earth Coordinate System
|author=James Schombert
|publisher=University of Oregon Department of Physics
|accessdate=19 March 2011 }}</ref>


“The horizontal coordinates are:
* '''Altitude (Alt)''', sometimes referred to as [[w:elevation (disambiguation) | elevation]],   is the angle between the object and the observer's local horizon. It is expressed as an angle between 0 degrees to 90 degrees.
* '''[[w:Azimuth|Azimuth]] (Az)''', that is the angle of the object around the horizon, usually measured from the north increasing towards the east. 
* '''Zenith distance''', the distance from directly overhead (i.e. the zenith) is sometimes used instead of altitude in some calculations using these coordinates.   The zenith distance is the [[w:complementary angles|complement]] of altitude (i.e. 90°-altitude).”<ref name=Horizontal/>
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==Altitudes==
{{main|Distances/Altitudes|Altitudes}}
[[Image:Vertical distances.svg|thumb|right|200px|This diagram shows the different types of vertical flight distances an aircraft may have. Credit: Dr. Wessmann and  [[w:User:AronRubin|AronRubin]].]]
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