こうせいじ
恒星時
1. sidereal time
2. Sidereal timeSidereal time /saɪˈdɪəriəl/ is a time-keeping system astronomers use to keep track of the direction to point their telescopes to view a given star in the night sky. Briefly, a sidereal day is a "time scale that is based on the Earth's rate of rotation measured relative to the fixed stars. " From a given observation point, a star found at one location in the sky will be found at nearly the same location on another night at the same sidereal time.
Read “Sidereal time” on English Wikipedia
Read “恒星時” on Japanese Wikipedia
Read “Sidereal time” on DBpedia
Read “Sidereal time” on English Wikipedia
Read “恒星時” on Japanese Wikipedia
Read “Sidereal time” on DBpedia
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