perihelion

perihelion

per·i·he·li·on

P0192800 (pĕr′ə-hē′lē-ən, -hēl′yən)n. pl. per·i·he·li·a (-hē′lē-ə, -hēl′yə) The point in a solar orbit where the orbiting body is closest to the sun.

[Alteration of New Latin perihēlium : peri- + Greek hēlios, sun; see sāwel- in Indo-European roots.]

per′i·he′li·al (-hē′lē-əl, -hēl′yəl) adj.

perihelion

(ˌpɛrɪˈhiːlɪən) n, pl -lia (-lɪə) (Astronomy) the point in its orbit when a planet or comet is nearest the sun. Compare aphelion[C17: from New Latin perihēlium, from peri- + Greek hēlios sun]

per•i•he•li•on

(ˌpɛr əˈhi li ən, -ˈhil yən)

n., pl. -he•li•a (-ˈhi li ə, -ˈhil yə) the point in the orbit of a planet or comet at which it is nearest to the sun. [1660–70; < Greek peri- peri- + hḗli(os) sun + -on neuter n. ending, on the model of perigee; earlier in the New Latin form perihelium] per`i•he′li•al, per`i•he′li•an, adj.

perihelion

per·i·he·li·on

(pĕr′ə-hē′lē-ən) The point nearest the sun in the orbit of a body, such as a planet or comet, that travels around the sun.

perihelion

the point in the orbit of a heavenly body where it is nearest the sun. Also called perihelium. See also aphelion.See also: Planets

the point in the orbit of a heavenly body where it is nearest the sun. Also spelled perihelium. Cf. aphelion.See also: Astronomy

perihelion

The point in a planet’s orbit at which it is closest to the Sun.

Thesaurus

Noun

perihelion - periapsis in solar orbit; the point in the orbit of a planet or comet where it is nearest to the sunperiapsis, point of periapsis - (astronomy) the point in an orbit closest to the body being orbitedaphelion - apoapsis in solar orbit; the point in the orbit of a planet or comet that is at the greatest distance from the sun

Translations

perihelion

(pĕr'əhē`lēən), point nearest the sun in the orbit of a body about the sun. See apsisapsis
(pl. apsides), point in the orbit of a body where the body is neither approaching nor receding from another body about which it revolves. Any elliptical orbit has two apsides.
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perihelion

(pe-ră-hee -kee-ŏn) The point in the orbit of a planet, comet, or artificial satellite in solar orbit that is nearest the Sun. The Earth is at perihelion on or about Jan. 3. The time of year at which Earth reaches perihelion varies over a period of about 20 000 years, getting progressively later in the year. The perihelion distance q , and aphelion distance Q , of major planets and asteroids are given in Tables 1 and 3, backmatter. See also advance of the perihelion.

Perihelion

(religion, spiritualism, and occult)

Although they approximate circles, every orbit is elliptical. The point in a satellite’s orbit when it is nearest the Sun is called its perihelion (from the Greek peri, meaning “near” and helios, meaning “sun”).

Perihelion

the point nearest the sun in the orbit of a celestial body moving around the sun in a conic section—an ellipse, parabola, or hyperbola. Because of perturbations caused by the planets, perihelion positions change. For the planet closest to the sun, Mercury, a perihelion shift has been detected that arises in accordance with the more precise law of gravitation that follows from the general theory of relativity. The distance from perihelion to the center of the sun is called the perihelion distance.

perihelion

[¦per·ə¦hēl·yən] (astronomy) That orbital point nearest the sun when the sun is the center of attraction.

perihelion

The point in the orbit of a planet or a comet where it is nearest to the sun. The earth is at perihelion about January 1, when it is 3.4%, or about 3 million miles nearer to the sun than about July 1, when it is at aphelion—the point farthest from the sun. See aphelion.

perihelion

the point in its orbit when a planet or comet is nearest the sun

perihelion

per·i·he·li·on

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Antonyms for perihelion

noun periapsis in solar orbit

Related Words

Antonyms