Probably because they already sent Huygens and there's planets and moons that haven't been landed on yet at all (i.e. almost all of them). Titan's one of the ra

Probably because they already sent Huygens and there's planets and moons that haven't been landed on yet at all (i.e. almost all of them). Titan's one of the rare exceptions. List's actually shockingly short: https://en.wikipedia.org/wiki/List_of_landings_on_extraterrestrial_bodies https://en.wikipedia.org/wiki/List_of_landings_on_extraterre...