Mars

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 also known as the 'Fire Star. '

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Mars Pathfinder

천문학; 행성학

The second in NASA's Discovery program of low-cost spacecraft with highly focused science goals, Mars Pathfinder landed successfully on Mars on July 4, 1997. Images, science ...

Mars Odiseja

천문학; 행성학

U. S. Orbital mission to Mars, part of NASA's Mars Exploration Program, launched in April, 2001 and arrived at Mars in October, 2001. The mission's goals are to map chemical ...

Mars Express

천문학; 행성학

The European Space Agency's first spacecraft to Mars, Mars Express launched in June 2003. The mission objectives are to search for subsurface water from orbit with a set of seven ...

Mars Orbiter Camera

천문학; 행성학

Camera system onboard the Mars Global Surveyor spacecraft. MOC consists of three cameras: A narrow angle system that provides grayscale high resolution views of the planet's ...

Phobos

천문학; 화성

The larger and innermost of the planet Mars' two moons. Phobos was discovered by Asaph Hall on August 17, 1877. In Greek mythology, Phobos was the son of Ares (Mars) and Aphrodite ...

Deimos

천문학; 화성

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

천문학; 화성

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

prolecna ravnodnvevnica

천문학; 화성

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 ...

zimski solsticij, kratkonevnica

천문학; 화성

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

x-zraci

천문학; 화성

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.