Green star may refer to: Green star (astronomy), a white or blue star that appears to be green due to an optical illusion One of the Esperanto symbols, the green star, or verda stelo Green Star (Australia), an environmental rating system for buildings in Australia Green Star Express, a bus company in the Philippines Green Star Media, a British publishing company Green Star Line, an American shipping line of 1919–1923 Green Star Series, five science fantasy novels by Lin Carter Sto-Oa, a fictional star that lies at the center of the DC Comics universe