This is dated Thursday, but it appears to be the same old same old.
Plutos Planethood Will Be Decided Shortly
June 22nd, 2006
Pluto has been considered a planet since its discovery, but this position has come under threat with the discovery of 2003 UB313 (aka Xena), an object larger than Pluto orbiting out further in the Solar System. The International Astronomical Union will be meeting in August to decide on the fate of Pluto. By September, we could have 8 or 10 planets in the Solar System, but there wont be 9 any more.
At its conference this August, the International Astronomical Union (IAU) will make a decision that could see Pluto lose its status as a planet.
For the first time, the organisation will be officially defining the word planet, and it is causing much debate in the world of astronomy.
There is only one thing that everyone seems to agree on: there are no longer nine planets in the Solar System.
The debate has been brought to a head by the discovery of a potential 10th planet, temporarily named 2003 UB313 in January 2005. This new candidate planet is bigger than Pluto.
The question now facing the IAU is whether to make this new discovery a planet.
Pluto is an unusual planet as it is made predominantly of ice and is smaller even than the Earths Moon.
There is a group of astronomers that are arguing for an eight-planet Solar System, with neither Pluto or 2003 UB313 making the grade as a planet; but a number of astronomers are arguing for a more specific definition of a planet.
One of these; Kuiper Belt researcher Dr Marc Buie, of the Lowell Observatory in Arizona, has come up with a clear planetary definition he would like to see the IAU adopt.
I believe the definition of planet should be as simple as possible, so Ive come up with two criteria, he said.
One is that it cant be big enough to burn its own matter - thats what a star does. On the small end, I think the boundary between a planet and not a planet should be, is the gravity of the object stronger than the strength of the material of the object? Thats a fancy way of saying is it round?
This definition could lead to our Solar System having as many as 20 planets, including Pluto, 2003 UB313, and many objects that were previously classified as moons or asteroids.
One possible resolution to the debate is for new categories of planet to be introduced. Mercury, Venus, the Earth and Mars would be rocky planets. The gas-giants Jupiter, Saturn, Uranus and Neptune would be a second category.
Whatever the outcome of this debate there is only one thing that we can be certain of; by September 2006 there will no longer be just nine planets in our Solar System.
Experts' vote could mean demotion for Pluto
Rocky Mountain News | August 12, 2006 | Jim Erickson
Posted on 08/13/2006 8:58:09 PM EDT by SunkenCiv
Pluto Could Lose Planet Status
PhysOrg.com | 21 June 2006 | Staff
Posted on 06/22/2006 7:11:12 AM EDT by PatrickHenry