Enhanced Habitats Mod for Stellaris
This mod allows habitats to be built around stars and asteroids and allows those to build asteroid mine and solar collector districts respectively.
It can be downloaded from the Steam Workshop here: https://steamcommunity.com/sharedfiles/filedetails/?id=1406918998
As per the Paradox mod terms at https://forum.paradoxplaza.com/forum/index.php?threads/rules-for-user-made-mods-and-edits-of-pds-games.708039/ this Mod has no license of any kind.