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1. Oxford American Dictionary

   ephemeris

   • IPA[əˈfem(ə)rəs]

   美式

   • n.
     a table or data file giving the calculated positions of a celestial object at regular intervals throughout a period；a book or set of such tables or files.

   • noun: ephemeris, plural noun: ephemerides

2. • 釋義
   • 相關詞

   n.

   名詞

   • 1. a table or data file giving the calculated positions of a celestial object at regular intervals throughout a period you can compute an ephemeris for any comet that is discovered and plot an accurate finder chart
   • ▪ a book or set of such tables or files.

   ephemeris time

   • n.
     time on a scale defined by the orbital period rather than the axial rotation of the earth.

   Oxford American Dictionary

   ephemeris time

   • n.
     time on a scale defined by the orbital period rather than the axial rotation of the earth.

   Oxford Dictionary

3. • 更多解釋

   ephemeris

   • IPA[ɪˈfɛm(ə)rɪs]

   英式

   • n.
     a table or data file giving the calculated positions of a celestial object at regular intervals ... you can compute an ephemeris for any comet that is discovered and plot an accurate finder chart

   Oxford Dictionary