noun
plane of revolution
Astronomical term referring to the plane in which a celestial body revolves around another.
地球の公転面は黄道面とも呼ばれる。
The Earth's plane of revolution is also called the ecliptic plane.
軌道面 (orbital plane) is a more general term for the plane of an orbit, while 公転面 specifically refers to the plane of revolution around a central body.
Compound of 公転 (revolution, especially of a celestial body) and 面 (plane, surface).