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Mars
Of, or relating to the study of, planet Mars.
Industry: Astronomy
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Mars
right ascension
Astronomy; Mars
A celestial coordinate; it is the angular distance measured from the vernal equinox eastward along the celestial equator to the hour circle of a given star or other celestial body. It can be defined ...
retrograde motion
Astronomy; Mars
Backward (westward) motion of the planet among the stars, resulting from the fact that it is viewed from the moving earth. It is the motion that a planet has when its right ascension is decreasing. ...
quadrature
Astronomy; Mars
Two bodies are in quadrature when their difference in celestial longitude is 90 degrees. This is the position of a superior planet when its elongation is 90 degrees, east or west, depending on the ...
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