masa

masa

The amount of matter in a body, which should not be confused with weight. The same object will have different weights in space and earth but the mass remains constant.

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Besedna vrsta: noun
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Industrija/področje: Astronomy
Category: Mars
Company: NASA
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extinción en masa

Biology; Cell biology

A time during which extinction rates are generally accelerated so that more than 50% of all species then living become extinct; results in a marked decrease in the diversity of ...

extinción en masa

Biology; Ecology

A catastrophic reduction in species population. The mass extinction now underway threatens more than half the animals on Earth, some of whom have already vanished; others, like ...

masa atómica

Biology; Ecology

The weight of an atom as expressed in atomic mass units (amus).

Marte

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 ...

Fobos

Astronomy; Mars

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 ...

radiación ultravioleta

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.

solsticio de invierno

Astronomy; Mars

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

rayos X

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.

cenit

Astronomy; Mars

The point of the celestial sphere directly overhead, 90 degrees above the horizon, for any point on earth; it is the point where a plumb line extended upward would intersect the ...

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Francisca Bittner

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Industrija/področje: Aerospace Category: Space flight

transbordador espacial

Nave espacial reutilizable con alas desarrollado por la Administración Nacional de Aeronáutica y del Espacio de Estados Unidos (NASA) para misiones de ...