Define planet, please

"A pair of low-mass stars is masquerading as an extrasolar planetary system in a new image by the Hubble Space Telescope. Such discoveries will add to the heated debate over what constitutes a planet.

About 200 planets have been found around nearby stars, many of which are at least as massive as Jupiter. Now researchers led by Kevin Luhman at Pennsylvania State University in the US have found an object about 12 times the mass of Jupiter orbiting a low-mass star called a red dwarf.

However, Luhman argues that the pair is not like other extrasolar planetary systems. For one thing, the mass of the smaller object puts it just on the border of what is considered a planet and what is considered a brown dwarf. Brown dwarfs are technically considered stars, although unlike normal stars they do not have enough mass to sustain nuclear fusion."

This is likely to be an ongoing debate. I suppose we have to get the right wording for things, but I just find it a tiny weeny little bit silly.

The actual discoveries are fascinating and beautiful.