Meaning Of The Word Ephemeris time

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What's the definition of Ephemeris time? Find Ephemeris time meanings, definitions and more at the Real Dictionary online.

Ephemeris time Meaning

Ephemeris time Definition
Ephemeris time Definition

What's The Definition Of Ephemeris time?

ephemeris time in American English
noun: time measured by the orbital movements of the earth, the moon, and the planets

ephemeris time in British English
noun: time that is based on the orbit of the earth around the sun rather than the axial rotation of the earth, one ephemeris second being 1/31 556 925.9747 of the tropical year 1900. It was used from 1960 to 1983 as an astronomical timescale but has been replac

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