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Mars
Of, or relating to the study of, planet Mars.
Industry: Astronomy
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Mars
ultraviolet radiation
Astronomy; Mars
The invisible electromagnetic radiation beyond the violet end of the spectrum of visible light, of wavelengths ranging, roughly, from 4000 down to 400 angstroms.
vernal equinox
Astronomy; Mars
The position on the celestial sphere occupied by the sun on or about march 21 when its path on the ecliptic crosses the celestial equator going from south to north. This point is also called the ...
winter solstice
Astronomy; Mars
The position on the ecliptic occupied by the sun about december 22 when it reaches its greatest southerly declination.