I'm a little confused. A few people have been talking about a 12th
planet...What happened to numbers 10 and 11? At last count it was nine...
1 Mercury
2 Venus
3 Earth
4 Mars
5 Jupiter
6 Saturn
7 Uranus
8 Neptune
9 Pluto
In which case I believe you might be talking about the as yet undiscovered
tenth planet which was theorised to exist because of the anomalous effect in
I think Neptune's orbit. Pluto is not big enough to be the sole cause of
this effect.
However, it is also thought by some that there was another planet where the
asteroid belt is now. That would bring the telly up to 11 planets. Still
one short.
Matthew.
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