宇宙年 yǔzhòunián cosmic year Definitions Defs Origin Strokes Stroke Words Sentences Sents 宇宙年 yǔzhòunián cosmic year The time it takes for the sun to complete one orbit around the center of the Milky Way galaxy, estimated to be about 2 billion Earth years Cross-References See 地球年 dìqiúnián
宇宙年 yǔzhòunián cosmic year The time it takes for the sun to complete one orbit around the center of the Milky Way galaxy, estimated to be about 2 billion Earth years Cross-References See 地球年 dìqiúnián
