公元2世纪托勒密发表《天文学大成》之后，几乎所有的天文学家都认为地球是宇宙的中心，太阳和其他行星每天绕地球一周。
Ever since Claudius Ptolemy published the " Almagest " in the second century AD , almost all astronomers had believed that the Earth lay at the centre of the universe .
天文学大成