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The Geekiest One

Retrograde Orbits

(note: This animation has no audio track.) – The Open University

Although many moons in the Solar System follow prograde orbits, there are some notable exceptions. The gas giant planets Jupiter, Saturn, Uranus and Neptune have several small outer moons that follow retrograde orbits; this means that they orbit their planet in the opposite direction to the planet’s rotation. In a retrograde orbit, a moon revolves in its orbit in the opposite direction from that in which the planet rotates about its axis.

Video by The Open University.

More information at https://www.futurelearn.com

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