Other websites with Celestia addons:
- The Celestia Motherlode (GitHub archive)
- Celestia Educational Activities
- Selden's Addons
- Celestial Matters sometimes has addons
- Celestia DeviantArt group
- Orion's Arm addons
- Website with lots of addons in Catalan
- Celestia Tieba (Chinese forum)
Important/major addons
- Celestia Origin is the best and the biggest collection of addons for Celestia, highly recommended!
- Populating galaxies with REAL stars by LukeCEL
- Spacecraft for Celestia megathread, I may put links to specific spacecraft addons in another post
- Extrasolar planet catalogue by Sirius_Alpha
- Project Echoes, Solar System updates by FarGetaNik
- Updated stars.dat using Gaia DR2 data by ajtribick
- Celestia Worldbuilding Project, a fictional worldbuilding project in the Triangulum Galaxy with contributions by several members
- Nebulae in Celestia using sprites by LukeCEL
Members' addon threads
These are threads created by forum members to collect all their addons. Most of these threads have lots of things, take a look! Sorted alphabetically so as not to favor one member over another.
- Anthony_B_Russo10's addons
- Cham's Addons (links no longer work)
- fyr02's Addons
- Gurren's Addons
- Joey P.'s Celestia
- Lafuente_Astronomy's Addons
- Minmus' Addons
- N3cronium's Addon repository
- SevenSpheres' Addons
- SpaceStalker's addons
- TheLostProbe's Celestia Addons
- Trappist Planet's Addons
- Trolligi's mods; Trolligi's other addons
- Vision's Addons
- List of DrJMOS' addons during 2020