The Moon's a balloon
In the past few years astonomers have discovered a range of bodies in the outer solar system that almost-but-not-quite fit the definitinon of a Planet. Actually, there hasn’t been a definition of a planet. Currently (August 2006) there is a meeting in Prague to discuss this and try and arrive at some consensus. Now while there is a lot of sensible discussion about this, I am particulary enjoying the anguish that it is causing the astrologers and assorted charlatans.