perihelion
perihelion — 名詞
- perihelionsingular
- periheliaplural
1. the place on a solar orbit where a planet, comet, or spacecraft is at its shorte
近日點
繞日時最靠近太陽的點
the place on a solar orbit where a planet, comet, or spacecraft is at its shortest distance from the Sun
Earth reaches perihelion in early January each year.
地球每年一月初都會到達近日點。
reach perihelion in + time period
The comet moved fastest when it passed perihelion near the Sun.
那顆彗星在太陽附近通過近日點時移動得最快。
pass perihelion
Haruto marked perihelion on the class chart with a blue pen.
Haruto 在課堂上用藍筆把近日點標在圖表上。
At perihelion, the probe received more heat from the Sun.
在近日點時，探測器從太陽接收到更多熱量。
News reports explained why Mars looks brighter near perihelion.
新聞報導解釋了為什麼火星在近日點附近看起來更亮。
- periapsis
the broader scientific term for the nearest point in any orbit, not only one around the Sun
- closest approach to the Sun
a descriptive phrase rather than the technical astronomy term
- aphelion
the point where the same orbiting body is farthest from the Sun
文法句型
at perihelion
reach perihelion
pass perihelion
用法筆記
Used in astronomy for an orbit around the Sun. For an orbit around another body, scientists usually use periapsis or a more specific term instead.