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The scientists agreed that for a celestial body to qualify as a planet:
- it must be in orbit around the Sun
- it must be large enough that it takes on a nearly round shape
- it has cleared its orbit of other objects
@ BBC: Pluto loses status as a planet
Criticism @ BBC: Pluto vote 'hijacked' in revolt
"It's an awful definition; it's sloppy science and it would never pass peer review - for two reasons.
"Firstly, it is impossible and contrived to put a dividing line between dwarf planets and planets. It's as if we declared people not people for some arbitrary reason, like 'they tend to live in groups'.
"Secondly, the actual definition is even worse, because it's inconsistent."
