I would like to ask you something

[Betegelge]

can someone teach me how to make addons for celestia on android? because i dont want to order or install addons, i want to create addons too, can anyone help?

[SevenSpheres]

Refer to Selden's guide and the Wikibook, especially the tutorials section. Keep in mind, however, that addon creation requires the use of non-Celestia software (at the very least, a text editor) so it will be difficult to do on a mobile device.

[John Van Vliet]

And in my case making Planet textures requires a lot of artistic background

Also a bunch of software , i use

Blender
Gimp
ISIS4
and some custom code

[trappistplanets]

to start off with making planetary textures, i suggest https://sites.google.com/view/fireonstexturetutorials/texture-tutorials

Added after 54 seconds:
also, check out this thread from cubicapoc, have all the things you need for different jobs
viewtopic.php?f=21&t=20719