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Why does Venus rotate anticlockwise?

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Anonymous

12y ago
Updated: 8/16/2019

First, the question is wrong. Venus does have unusual rotation, but that's because it rotates clockwise (as viewed from above our north pole). One current theory suggests that Venus thick and heavy atmosphere has acted like a giant "air brake" slowing its rotational speed over time.

Other theories suggest that there was a collision with another body and this caused Venus rotation to slow and reverse.

Incidentally, although Venus itself rotates very slowly (rotational period 243 Earth days), its equatorial clouds have a rotation period of 4 days (equivalent to wind speeds of 100m/s). Consequently the cloud tops are rotating faster than the surface of the planet. Some of the Sun's energy is absorbed in the atmosphere in a "greenhouse effect" due to the heavy concentration of CO2 in the atmosphere. This energy provides the main driving force for the atmosphere's "super rotation".

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Wiki User

12y ago

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