Double planet

[NuclearVacuum]

I wish to know the coding required to make a double planet system (similar to how Pluto and Charon orbit each other).

[selden]

You should take a look at the definition of Pluto and Charon in Celestia's catalog file for the solar system: Celestia/data/solarsys.ssc
It's a plain text file.

Documentation for SolarSystemCatalog files is available on the MotherLode at http://www.celestiamotherlode.net/catal ... ation.html
and in the Celestia WikiBook at http://en.wikibooks.org/wiki/Celestia/SSC_File

[NuclearVacuum]

Ooh, I got it. Is there a reason that there is no orbital plan for a double planet? When you look at the orbits of the other planets, the plane of a double planet is not shown, unless you click on it.