OT: The solar system has 12 planets

[Phoenix-D]

Pluto doesn't have an atmosphere, so that wouldn't count it either.

[DeadZone]

Oh really?
http://pluto.jhuapl.edu/science/ever...tmosphere.html

Basically, my understanding of everything Ive read about Pluto, the atmosphere isnt exactly stable anyway

[Phoenix-D]

Temporary atmospheres don't count. The thing disappears when Pluto moves away, and its made from pieces of the surface that sublimate off, so the point still stands I think.

[DeadZone]

tbh though, its a theory that the atmosphere will disappear, we dont know for sure
Lets face it, it was "supposed" to have disappeared already

[Kamog]

Is there a reason for the requirement that a planet has to be orbiting a star? What happens if a big round object forms in space away from any stars, but not massive enough to become a star itself. What do we call such an object?

[narf poit chez BOOM]

...Orbiting a sun or within arbitrary% of round?