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A highly accurate astronomical system for the measurement of time based in theory on the period of Earth's orbit, but in practice relying on lunar observations and an accurate lunar ephemeris so as to not be subject to the irregularities of Earth's rotation. The year 1900 is considered a standard year, containing 31,556,925.9747 seconds of ephemeris time.
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"Ephemeris time." YourDictionary. LoveToKnow. www.yourdictionary.com/ephemeris-time.

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Ephemeris time. (n.d.). In YourDictionary. Retrieved from https://www.yourdictionary.com/ephemeris-time
Noun

(uncountable)

  1. (astronomy) A former standard astronomical time scale intended to overcome the drawbacks of irregularly fluctuating mean solar time, superseded in the 1970s.
  2. (astronomy) A modern relativistic-coordinate time scale.
English Wiktionary. Available under CC-BY-SA license.
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"Ephemeris time." YourDictionary. LoveToKnow. www.yourdictionary.com/ephemeris-time.

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Ephemeris time. (n.d.). In YourDictionary. Retrieved from https://www.yourdictionary.com/ephemeris-time

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Also Mentioned In


  • ephemerides
  • january-0
  • ephemerises
  • ephemerist
  • time-of-day
  • on-time
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  • about-time
  • time-difference
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WORDS NEAR ephemeris time IN THE DICTIONARY


  • ephemeride
  • ephemerides
  • ephemerids
  • ephemeris
  • ephemeris time
  • ephemerises
  • ephemerist
  • ephemerists
  • ephemeron
  • ephemeroptera
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