Pluto, redux?

Well! As posted here, and here, I’ve been talking about this whole “Planet” thing. Now there’s more development. Apparently the IAU is revising their revised revision again, and might eliminate Pluto from the planet list, dropping back to the 8 “classical” planets, and number all other bodies that would have previously been called “planet” into …

We've got 12 Planets!

It’s official! The voting membership of the IAU has accepted the draft definition of “Planet.” This means that we’ve got three new planets, with many many more to come. Ceres, the planet formerly known as an asteroid, takes the coveted fifth planet position away from Jupiter. Charon, the planet formerly known as Pluto’s satellite, is …

Pluto, Plutons, Plutonium, Plutae?

The International Astronomical Union has posted a draft definition of “planet” that will serve to define our solar system and all others for all time! Well, not exactly, as Phil Plait over at badastronomy.com points out quite well. The rules boil down thus: 1) It’s got to be big enough to be spherical due to …