Difference between revisions 2243985 and 2290298 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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The lower troposphere is the densest layer of the atmosphere, and some of these issues may be mitigated by using a space gun with a "gun barrel" reaching above it (e.g. a gun emplacement on a mountaintop).

A space gun, by itself, is generally not capable of placing objects into stable orbit around the planet, unless the objects are able to perform course corrections after launch.
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==Sounding rockets==

{{main|Sounding rockets}}⏎
[[Image:Nike-Black Brant VC XQC launch.gif|thumb|left|250px|Carried aloft on a Nike-Black Brant VC sounding rocket, the microcalorimeter arrays observed the diffuse soft X-ray emission from a large solid angle at high galactic latitude. Credit: NASA/Wallops.]]
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