ephemeris
21ephemeris — n. astronomical calendar (shows the approximate position of the sun, moon and stars in the sky during a given year) …
22ephemeris — [ɪ fɛm(ə)rɪs, fi:m ] noun (plural ephemerides ˌɛfɪ mɛrɪdi:z) Astronomy & Astrology a table of the calculated positions of a celestial object at regular intervals throughout a period. Origin C16: from L., from Gk ephēmeros lasting only a day …
23ephemeris — n. [Gr. pl. Ephemerides.] 1. Journal, diary. 2. (Astron.) Astronomical almanac or calendar …
24ephemeris — ephem·er·is …
25ephemeris — /əˈfɛmərəs/ (say uh femuhruhs), /i / (say ee ) noun (plural ephemerides /ɛfəˈmɛrədiz/ (say efuh meruhdeez)) 1. a table showing the positions of a heavenly body on a number of dates in an orderly sequence. 2. an astronomical almanac containing… …
26ephemeris time — noun Date: 1950 a uniform measure of time defined by the orbital motions of the planets …
27ephemeris time — noun a) A former standard astronomical time scale intended to overcome the drawbacks of irregularly fluctuating mean solar time, superseded in the 1970s. b) A modern relativistic coordinate time scale …
28ephemeris time — noun time on a scale defined by the orbital period rather than the axial rotation of the earth …
29ephemeris time — ephem′eris time n. astron. time measured by the orbital movements of the earth, the moon, and the planets • Etymology: 1945–50 …
30ephemeris time — noun (astronomy) a measure of time defined by Earth s orbital motion; terrestrial time is mean solar time corrected for the irregularities of the Earth s motions • Syn: ↑terrestrial time, ↑TT, ↑terrestrial dynamical time, ↑TDT • Topics:… …
