Haltickling
2nd Level Green Feather
- Joined
- Apr 3, 2001
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An astronomers' conference decided today on a general definition of planets, for the first time in history. They defined criteria for three different categories of solar objects, depending on size and orbit: planets, dwarf planets, and minor objects (asteroids and comets).
Unfortunately, Pluto no longer matches the criteria for planets. It's too small, and the orbit is too eccentric for a real planet, so it was downgraded to the status "dwarf planet", which it shares with a dozen other objects.
So from now on, our solar system has only 8 planets, per astronomic definition. All school books will have to be reprinted!
Unfortunately, Pluto no longer matches the criteria for planets. It's too small, and the orbit is too eccentric for a real planet, so it was downgraded to the status "dwarf planet", which it shares with a dozen other objects.
So from now on, our solar system has only 8 planets, per astronomic definition. All school books will have to be reprinted!