Wikipedia:Colonization of Mercury solar energy with helium-3 Colonization of Mercury Colonization of Mercury solar energy by some solar energy for helium-3 with helium-3 solar energy with helium-3 6 1/2 times greater Colonization of Mercury silly article Colonization of Mercury humans to colonize the planet closest to the sun English http://en.wikipedia.org/wiki/Colonization_of_Mercury silly article solar energy Colonization of Mercury silly article Colonization of Mercury by some 6 1/2 times greater by some solar energy with helium-3 6 1/2 times greater 6 1/2 times greater en:Colonization of Mercury English by some solar energy colonize parts of Mercury