英语词汇“perihelion”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

perihelion

/ˌpɛrɪˈhiːlɪən

noun (plural perihelia /ˌpɛrɪˈhiːlɪə/) Astronomy

The point in the orbit of a planet, asteroid, or comet at which it is closest to the sun: today Mercury is at perihelion...

He calculated to within a month the return in 1759 of Halley's comet to its perihelion (closest point to the Sun).
For objects orbiting Earth, periapsis and apoapsis are known as perigee and apogee; for objects orbiting the Sun, these locations are known as perihelion and aphelion.
This affects the climate because the influx of solar energy to our planet would then vary between perihelion and aphelion by a larger proportion than at present.

The opposite of aphelion.

Origin

Mid 17th century: alteration of modern Latin perihelium (by substitution of the Greek inflection -on), from Greek peri- 'around' + hēlios 'sun'.

单词	perihelion
释义	perihelion /ˌpɛrɪˈhiːlɪən / noun (plural perihelia /ˌpɛrɪˈhiːlɪə/) Astronomy The point in the orbit of a planet, asteroid, or comet at which it is closest to the sun: today Mercury is at perihelion... He calculated to within a month the return in 1759 of Halley's comet to its perihelion (closest point to the Sun). For objects orbiting Earth, periapsis and apoapsis are known as perigee and apogee; for objects orbiting the Sun, these locations are known as perihelion and aphelion. This affects the climate because the influx of solar energy to our planet would then vary between perihelion and aphelion by a larger proportion than at present. The opposite of aphelion. Origin Mid 17th century: alteration of modern Latin perihelium (by substitution of the Greek inflection -on), from Greek peri- 'around' + hēlios 'sun'.
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