Tilt of Uranus
Below is an extract from an article from New Scientist.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhONlsBPxe68PCtTY9EMdH_NM4TDW3TOz4jAKZmsanOmLjQbkITXXhgWl2MX1GcTu9dbyfo3BGzQ_qimEnuU0lC7TKbUcf5gI782vE2Tlnhljv6vztGdRB4FAi8SDQNREMVb4hs/s320/uranus_300_400.jpg)
Now Gwenaël Boué and Jacques Laskar at the Paris Observatory in France have come up with another explanation: Uranus may once have had an unusually massive extra moon. If the moon had 1 per cent of the mass of Uranus – and orbited at a certain distance – it would slightly unbalance the planet and increase its wobble about its axis. After about 2 million years, the wobbling could have become exaggerated enough to tip the planet on its side. Read on.
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