V2EX ecliptic coordinates

Ecliptic Coordinates

定义 Definition

黄道坐标(ecliptic coordinates):天文学中的一种天球坐标系,以黄道面(地球绕太阳公转轨道所在平面在天球上的投影)为基准来表示天体位置。常用的两个坐标是黄经(ecliptic longitude, λ)和黄纬(ecliptic latitude, β)。该坐标系常用于研究太阳系天体、行星运动与黄道附近的天体分布。

发音 Pronunciation (IPA)

/klptk kordnts/

例句 Examples

The astronomer converted the star’s position into ecliptic coordinates.
天文学家把这颗恒星的位置换算成黄道坐标。

Because the Moon stays close to the ecliptic, ecliptic coordinates are often convenient for predicting eclipses and planetary conjunctions.
由于月球通常靠近黄道面,使用黄道坐标常常更便于预测日月食以及行星合等现象。

词源 Etymology

ecliptic 来自希腊语 ekleiptikos(与“缺失/掩蔽”有关),源头与 ekleipsis(“食”,即日食、月食)同源:古人观察到食the ecliptic(黄道)coordinates 源自拉丁语 *co-*(共同)+ ordinare(排列、整理),指“用一套规则来定位/排列的坐标”。

相关词 Related Words

文学与经典著作 Literary Works

  • Jean Meeus, Astronomical Algorithms(书中多处用到黄道经纬来进行行星与太阳、月亮位置计算)
  • P. Kenneth Seidelmann (ed.), Explanatory Supplement to the Astronomical Almanac(讲解天球坐标系统转换,包含黄道坐标)
  • J. L. Lawrence, Celestial Calculations: A Gentle Introduction to Computational Astronomy(入门性地介绍含黄道坐标在内的坐标系与计算)
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