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perihelio

The point where (and when) an object orbiting the sun is closest to the sun.

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argumento del perihelio (ω, longitud del perihelio)
Astronomy; General astronomy

Angular distance (measured in the plane of the object's orbit and in the direction of its motion) from the ascending node to the perihelion point.

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Developed by the National Radio Astronomy Observatory.

órbita
Astronomy; General astronomy

The path of one object about another (used here for an object orbiting the sun).

meteoros
Astronomy; General astronomy

Small rocky and/or icy particles that are swept up by the earth in its orbit about the sun. Also called "shooting stars", they travel across the sky in a very short time, from ...

equinoccio
Astronomy; General astronomy

Either of the two points (vernal, autumnal) on the celestial sphere where the ecliptic (which is the apparent path of the sun on the sky) intersects the celestial equator. Due to ...

cometa
Astronomy; General astronomy

A celestial body orbiting the sun (though some may be ejected from the solar system by planetary perturbations) that displays (at least during a portion of its orbit) some ...

cenit
Astronomy; General astronomy

The point directly overhead in the sky.

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