Mars

Mars

Of, or relating to the study of, planet Mars.

Industry: Astronomy

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Mars

eccentricity

Astronomy; Mars

The degree of flattening of an ellipse and how much it deviates from a circular shape. With reference to the orbit of a planet, the distance between the center of its orbit and the center of the ...

diurnal motion

Astronomy; Mars

The apparent daily rotation of the heavens from east to west; an effect of earth's rotation about its axis.

Mars is the fourth planet from the Sun. Mars' diameter is 6,790 km and takes 687 days to orbit the Sun. Mars is named after the Roman god of war. In Eastern Asian cultures Mars is also known as the ...

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.

x-rays

Astronomy; Mars

Very short wavelength radiations beyond the ultraviolet in the spectrum, which are about one ten-thousandth as long as the visible violet and are extremely penetrating.