Associations to the word «Ephemeris»

EPHEMERIS, noun. (obsolete) (singular or plural) A journal or diary.

EPHEMERIS, noun. (astronomy) A table giving the apparent position of celestial bodies throughout the year; normally given as right ascension and declination

EPHEMERIS, noun. Software that calculates the apparent position of celestial bodies.

EPHEMERIS TIME, noun. (astronomy) A former standard astronomical time scale intended to overcome the drawbacks of irregularly fluctuating mean solar time, superseded in the 1970s.

EPHEMERIS TIME, noun. (astronomy) A modern relativistic-coordinate time scale.

EPHEMERIS, noun. An annual publication containing astronomical tables that give the positions of the celestial bodies throughout the year; "today computers calculate the ephemerides".