The planets_mod.zip file you have requested: Modifications / Planets Mod - 173.66kb is not available. Perhaps try browsing all files for the game Grand Theft Auto: San Andreas and upload any files you want to share or are missing. This is the only information we could locate:
If you don't like the moon, you might like Saturn or Jupiter ;) This small mod replaces the moon in the game with the planets Saturn and Jupiter. Looks pretty good.