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proljetna ravnodnevica

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 march equinox and the first point of aries.

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  • Category: Mars
  • Company: NASA
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zimski solsticij
Astronomy; Mars

The position on the ecliptic occupied by the sun about december 22 when it reaches its greatest southerly declination.

ultraljubičasto zračenje
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.

Mars
Astronomy; Mars

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 ...

atmosfera
Astronomy; Mars

The gaseous envelope surrounding a celestial body.

astronomska jedinica (AJ)
Astronomy; Mars

A measure for distances within the solar system, equal to the mean ditance of the earth from the sun, which is about 93,000,000 miles.

osa rotacije
Astronomy; Mars

The straight line, real or imaginary, passing through a rotating body and is the line about which that body rotates.

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