create new object in Celestia

[Alond1982]

hi.
how to Create my own worlds (planets) and stars in the simulation?
i am new in celestia.
I will appreciate any help.
thanks.

[selden]

You can add objects to Celestia by using your favorite text editor to create an appropriate catalog file (SSC for planets & moons, STC for stars, DSC for deep space objects) and placing it in Celestia's "extras" folder.

There are several tutorials and reference documents available.

See, for example:

http://www.celestiamotherlode.net/catalog/documentation.html

https://www.classe.cornell.edu/~seb/celestia/addon-intro.html

https://en.wikibooks.org/wiki/Celestia/Catalog_File_Reference