V2EX perigee

Perigee

Definition / 释义

近地点:天体(如月球、卫星)在绕地轨道上距离地球最近的位置或时刻。(相对:apogee 远地点)也可引申指“最接近某事的时刻/点”。

Pronunciation / 发音

/prdi/

Examples / 例句

The Moon is at perigee tonight.
今晚月球处在近地点。

At perigee, the satellite’s speed increases and Earth appears slightly larger in the sky.
在近地点,卫星速度会加快,地球在天空中看起来也会略大一些。

Etymology / 词源

perigee 来自希腊语词根:**peri-**(“在……周围/靠近”)+ (“地球”,与“Gaia”同源),原意接近“靠近地球”。后经由拉丁化形式进入英语,用于天文学描述“近地点”。

Related Words / 相关词

Literary Works / 文学作品

  • Carl Sagan, Cosmos(《宇宙》)
  • Isaac Asimov, Asimov’s New Guide to Science(《阿西莫夫最新科学指南》)
  • Jules Verne, From the Earth to the Moon(《从地球到月球》)
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