Either of the points in the orbit of a celestial object at which it is at its greatest or smallest distance from the body which it orbits; = apsis, n.…

Astronomy. One of the two points in the elliptic orbit of a planetary body, at which it is respectively at its greatest and least distance from the…

†(a) Surveying = station, n. 6a (obsolete); †(b) Astronomy = stationary point, n. 3 (obsolete); (c) Drawing = point of sight n. at phrases 4l.

= apse, n., apsis, n.

Astronomy. A point in a planet's orbit at which it appears stationary in its passage across the sky. Cf. sense stationary, adj. 1a and point of st…

Astronomy. = apsis, n. 2.