Retrograde and prograde motion

Retrograde orbit: the satellite (red) orbits in the direction opposite to the rotation of its primary (blue/black)

The orange moon is orbiting in the opposite direction.

Retrograde motion is motion in the direction opposite to the movement of something else and the contrary of direct or prograde motion. This motion can be the orbit of one body about another body or about some other point, or the rotation of a single body about its axis, or other phenomena such as precession or nutation of the axis. In reference to celestial systems, retrograde motion usually means motion which is contrary to the rotation of the primary, that is, the object which forms the system's hub.

单词	Retrograde movement
释义	Retrograde movement 原声例句南方与北方（中） But the retrograde movement towards the gate had begun — as unreasoningly, perhaps as blindly, as the simultaneous anger. 但是朝大门的逆行运动已经开始了——就像同时发生的愤怒一样不合理，也许是盲目。英语百科 Retrograde and prograde motion Retrograde motion is motion in the direction opposite to the movement of something else and the contrary of direct or prograde motion. This motion can be the orbit of one body about another body or about some other point, or the rotation of a single body about its axis, or other phenomena such as precession or nutation of the axis. In reference to celestial systems, retrograde motion usually means motion which is contrary to the rotation of the primary, that is, the object which forms the system's hub.
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Retrograde movement

Retrograde and prograde motion