13 ‘Backwards’ rotation

Another trait that makes Venus different to most of the planets in the Solar System is its rotation. The usual routine for planets is to spin anti-clockwise on their axis, but Venus is an oddball and flaunts a clockwise rotation. The leading theory as to why Venus and Uranus have what is known as a ‘retrograde rotation’ is that they were smacked by large objects early in their history. This collision left the planet seeing stars and spinning the wrong way.