The Signs Of Neptune

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A look at the planet Neptune and its Moon Triton which has a retrograde orbit.  Triton is NOT the ‘only’ moon in the solar system with a retrograde orbit. Two of Jupiter’s smaller outer moons also orbit their host planet backwards.

Retrograde motion is motion in the direction opposite to the movement of something else, and is the contrary of direct 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. In reference to astronomical systems, retrograde motion usually means motion which is against the rotation of the primary body which forms the systems hub.

Farthest from the Sun: The Planet Neptune (Amazing Science: Planets)
Farthest from the Sun: The Planet Neptune (Amazing Science: Planets)
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