Oh, the extragalactic distance ladder. | บันไดระยะห่างของจักรวาล The Plimpton Stimulation (2010) |
extragalactic |
extragalactic | (adj) outside or beyond a galaxy |
galaxy | (n) (astronomy) a collection of star systems; any of the billions of systems each having many stars and nebulae and dust, Syn. extragalactic nebula |