The IAU have today voted on a series of revised resolutions. The result of which is that Pluto is no longer classified as a planet.
There are several websites covering this story in detail, so I won't repeat them here. Check out;
Tom's Astronomy Blog
I'm still getting my head around this one. Parts of the definition make sense, and other still leave me a little confused! If I make any more sense of it I'll post something later today.
This is sure to be a big topic of debate at our next CAS meeting on Tuesday 29th August, don't forget.