solsticio de invierno

solsticio de invierno

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

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Industry/Domain: Astronomy
Category: Mars
Company: NASA
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invierno

Weather; General weather

Astronómicamente, este es el período entre el solsticio de invierno y el equinoccio de primavera. Se caracteriza por tener las temperaturas más frías del año, cuando el sol está ...

invierno

Weather; Seasons

La estación con temperaturas más frías del año, entre el otoño y la primavera. Desde el solsticio de invierno los días se hacen más cortos y las nochas más largas. Los días se ...

solsticio

Education; SAT vocabulary

La época del año cuando el sol está en su máxima declinación.

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.

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 ...

cuadratura

Astronomy; Mars

Two bodies are in quadrature when their difference in celestial longitude is 90 degrees. This is the position of a superior planet when its elongation is 90 degrees, east or west, ...

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Industry/Domain: Anatomy Category: Cytology

células

Las células son la unidad funcional básica de la vida (todos los organismo están compuestos por ellos). Fueron descubiertos por Robert Hooke en 1665. ...