ephemeris
11ephemeris — n. (pl. ephemerides) Astron. an astronomical almanac or table of the predicted positions of celestial bodies. Etymology: L f. Gk ephemeris diary (as EPHEMERAL) …
12Ephemeris time — (ET) is a time scale used in ephemerides of celestial bodies, in particular the Sun (as observed from the Earth), Moon, planets, and other members of the solar system. This is distinct from Universal Time (UT): the time scale based on the… …
13ephemeris time — Astron. time measured by the orbital movements of the earth, the moon, and the planets. [1945 50] * * * ▪ chronology (ET), the first dynamical time scale in history; it was defined by the International Astronomical Union in the 1950s and… …
14Ephemeris belli Troiani — Unter dem Pseudonym Dictys Cretensis wurde im 4. Jahrhundert die Ephemeris belli Troiani veröffentlicht, ein lateinischer Roman über den trojanischen Krieg in sechs Büchern. Das Werk ist neben der als Gegenentwurf dazu zu verstehenden Bearbeitung …
15ephemeris second — Astron. the unit of ephemeris time, defined as a precise fraction of the length of the tropical year 1900. [1965 70] * * * ephemeris second, Astronomy. the fundamental unit of ephemeris time, adopted in 1956 by the International Bureau of Weights …
16ephemeris time — The uniform measure of time defined by the laws of dynamics and determined in principle from the orbital motions of the planets, specifically the orbital motion of the earth as represented by Newcomb’s Tables of the Sun. An ephemeris day equals… …
17ephemeris second — Astron. the unit of ephemeris time, defined as a precise fraction of the length of the tropical year 1900. [1965 70] * * * …
18ephemeris time — /əˈfɛmərəs taɪm/ (say uh femuhruhs tuym) noun Astronomy a measure of time independent of variations in the earth s rotation rate. The ephemeris second is the fundamental unit and is defined as a precise fraction of the tropical year 1900 …
19ephemeris time — efemeridinis laikas statusas T sritis Standartizacija ir metrologija apibrėžtis Tolygiai tekantis laikas, vartojamas kaip nepriklausomas kintamasis dangaus kūnų mechanikos lygtyse. Jo ir pasaulinio laiko skirtumas tikrinamas stebint Mėnulio… …
20ephemeris — noun /ɪˈfɛməɹɪs/ a) A table giving the apparent position of celestial bodies throughout the year; normally given as right ascension and declination b) Software that calculates the apparent position of celestial bodies. See Also: ephemeride …
