天てん体たい暦れき

noun

astronomical ephemeris; ephemeris

Technical term in astronomy for a table or data file giving the calculated positions of celestial bodies at regular intervals.

• 天てん体たい暦れきを使つかって惑わく星せいの位い置ちを計けい算さんする。

  Calculate the positions of the planets using an astronomical ephemeris.