apsides

n.

拱点( apsis的名词复数 )；

Apsides
Apsis, apsides
Apsis, apsides
The motion of the line of apsides of ζ phoenicis
The motion of the line of apsides of Zeta Phoenicis
THE ORIENTATION OF THE LINES OF APSIDES OF SPECTROSCOPIC BINARIES
RU Monocerotis. Further Data on the Motion of the Line of Apsides
Elliptical Sun-Synchronous Orbits with Line of Apsides Lying in or Near the Equatorial Plane
Elliptic orbits. Motion of the line of apsides. The influence of a third body on the epochs of minima.
Constellation of elliptical orbit satellites with line of apsides lying in or near the equatorial plane