Why can’t i download some celestial bodies?

Celestial Bodies are only download on pc on your mobile you cant you can change desktop site on your mobile and download.

What exactly is the problem?
Do you get an error message or something?

If you're on mobile, you have to activate the "desktop view or desktop website" option in your browser, at the specific site of the celestial body you want.
After activation, the site should reload, but this time the PC version, with the download link.