Two years ago the planet Pluto was kicked out the planet lineup. Why? Because Pluto was
just to small to be called a planet. Now the Pluto lovers are fighting back. Revisit the definition of a planet which hadn't been changed since ancient Greece.
A planet must have three characteristics:
1. orbit round the sun
2. be big enough that its gravity makes it round
3. It needs to have cleared its path of debris by flinging the debris with its gravity or absorbing it.
Conclusion?
Pluto becomes a dwarf planet just like his moon Charon and the giant asteroid Ceres.
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