Free Republic
Browse · Search
General/Chat
Topics · Post Article

To: SunkenCiv
Charon, by contrast, orbits Pluto, as do at least two other moons, so Charon and the other two moons are not planets.

Well, the Pluto-Charon system has its barycenter outside of both bodies, so it could be argued that the Pluto-Charon system is a double-planet, while Nix and Hydra orbit the two.

18 posted on 08/13/2006 9:56:20 PM PDT by Pyro7480 ("Love is the fusion of two souls in one in order to bring about mutual perfection." -S. Terese Andes)
[ Post Reply | Private Reply | To 17 | View Replies ]


To: Pyro7480; SunkenCiv
Well, the Pluto-Charon system has its barycenter outside of both bodies, so it could be argued that the Pluto-Charon system is a double-planet

The article seems to indicate that the IAU is leaning toward this view as well:

"... Charon, once considered a moon of Pluto but now described as its double planet ... "

24 posted on 08/15/2006 8:13:24 PM PDT by annie laurie (All that is gold does not glitter, not all those who wander are lost)
[ Post Reply | Private Reply | To 18 | View Replies ]

Free Republic
Browse · Search
General/Chat
Topics · Post Article


FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson