地ち球きゅう照しょう

noun

earthshine; Earth light

Astronomical term for the faint illumination of the dark part of the moon caused by sunlight reflected from the Earth.

• 新しん月げつの前ぜん後ごには、地ち球きゅう照しょうで月つきの暗くらい部ぶ分ぶんがうっすらと見みえることがある。

  Around the new moon, the dark part of the moon can sometimes be faintly seen due to earthshine.