1. ephemeris

noun. an annual publication containing astronomical tables that give the positions of the celestial bodies throughout the year.


  • yearbook
  • yearly


  • perennial
  • biennial

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Sentences with ephemeris

1. Noun, singular or mass
Consult your ephemeris in the Mercury column to see if there is an “R” for retrograde preceding the date you want to take the exam.

2. Noun, plural
Consulting your ephemeris so that you can tell what signs the sun and moon and Mercury are in, or whether the moon is void-of-course, or that Mercury is direct or retrograde can help to set the schedule.

3. Adjective
Look at the bottom of the ephemeris page or consult an Internet table to see when the moon is void-of-course.