descension

Etymology
From, from , from.

Noun

 * 1)  Descent; the act of descending.
 * 2)  The descent below the horizon of a celestial body.
 * 1)  The descent below the horizon of a celestial body.
 * 1)  The descent below the horizon of a celestial body.

Etymology
Borrowed from.

Noun

 * 1) descent