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WordNet-Online
Definitions from WordNet
Noun ephemeris time has 1 sense
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Definitions from the WebEphemeris TimeDefinition:Ephemeris Time refers to a precise and uniform time scale used in astronomy and celestial mechanics. It is based on the motion of celestial bodies and provides a standard for measuring events in the solar system. Senses and Usages:Noun - Astronomical Time Scale:Ephemeris Time, often abbreviated as ET, is a precise time scale utilized by astronomers and scientists for measuring the positions of celestial objects. It is based on the orbital motion and positions of specific astronomical bodies. Example sentence: The ephemeris time is commonly used to calculate the accurate positions of planets, stars, and other celestial objects. Noun - Local Coordinate Time System:Ephemeris Time can also refer to a local coordinate time system based on astronomical observations at a specific observatory or location. This localized version of ephemeris time is used for calculating precise local positions of celestial bodies. Example sentence: The observatory uses ephemeris time to accurately determine the local positions of stars and planets visible in their night sky. Related Products: | ||||
ephemerality ephemerally ephemeralness ephemerid ephemerida ephemeridae ephemerides ephemeris ephemeris time ephemeroidea ephemeron ephemeroptera ephemeropteran ephemiral ephemoral ephemral epherma
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