sidereal day在线翻译
1. 恒星日[天]：side weir 侧堰 | sidereal day 恒星日[天] | sidereal hour 恒星小时[天]
noun
1. sidereal day什么意思
1. the time for one complete rotation of the earth relative to a particular star, about 4 minutes shorter than a mean solar day
Synonym: day