prolecna ravnodnvevnica

prolecna ravnodnvevnica

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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Частина мови: noun
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Галузь/тема: Astronomy
Category: Mars
Company: NASA
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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 ...

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Deimos

Astronomy; Mars

The smaller and outermost of the planet Mars' two moons. Deimos was discovered by Asaph Hall on August 11, 1877. In Greek mythology, Deimos was the son of Ares (Mars) and ...

ultrajubicasto zracenje

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The invisible electromagnetic radiation beyond the violet end of the spectrum of visible light, of wavelengths ranging, roughly, from 4000 down to 400 angstroms.

zimski solsticij, kratkonevnica

Astronomy; Mars

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

x-zraci

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.

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