.CELX File Extension
File TypeCelestia Script
What is a CELX file?
Script used by Celestia, a free universe browsing application; written using the Lua scripting language and specifies instructions for the location and observation angle in the universe over time; used for marking locations in space as well as for creating tours of the universe.
CELX files can be run in Celestia by selectingfrom the application menu and then selecting your script.
NOTE: CELX files are created in a plain text format and are written using a text editor.