BabelNet

bn:00025347n

Noun Concept

Categories: Articles with short description, Astronomical epochs, Articles with permanently dead external links

epoch date of reference 1875.0 1900.0 1950.0

(astronomy) an arbitrarily fixed date that is the point in time relative to which information (as coordinates of a celestial body) is recorded WordNet 3.0

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(astronomy) an arbitrarily fixed date that is the point in time relative to which information (as coordinates of a celestial body) is recorded WordNet 3.0 & Open English WordNet

In astronomy, an epoch or reference epoch is a moment in time used as a reference point for some time-varying astronomical quantity. Wikipedia

A moment in time used as a reference for the orbital elements of a celestial body Wikipedia Disambiguation

Moment in time used as a reference point for some time-varying astronomical quantity Wikidata

Moment in history which is usually marked by some significant event. OmegaWiki

A precise instant of time that is used as a point of reference. Wiktionary

( astronomy) time reference point. Wiktionary (translation)

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