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Terrestrial Time

Terrestrial Time (TT) is a modern astronomical time standard defined by the International Astronomical Union, primarily for time-measurements of astronomical observations made from the surface of Earth. For example, the Astronomical Almanac uses TT for its tables of positions (ephemerides) of the Sun, Moon and planets as seen from Earth. In this role, TT…

History, Art, Measurement & Standards

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Overview

History

Current definition

Realizations

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Map overview Semantic statistics

Terrestrial Time

Nodes43
Edges42
Triples20
Avg. degree1.95
Density0.046512
Components1

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Terrestrial Time

Top relations

related to history · 20
Terrestrial Time → Barycentric Dynamical Time, Both, Doubts, Earth's, Geocentric Coordinate Time, IAU, In, International Astronomical Union, It, Recommendation IV, SI, Solar, TCG, TDB, TDT, Terrestrial Dynamical Time, Thus, TT, XVI General Assembly, XXI General Assembly

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Important terminology

tt time tai tcg defined et seconds displaystyle mathrm atomic clocks earth definition bipm scale international si julian date ephemeris

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Terrestrial Timerelated to historyInternational Astronomical Union0.60section
Terrestrial Timerelated to historyIAU0.60section
Terrestrial Timerelated to historyXVI General Assembly0.60section
Terrestrial Timerelated to historyTerrestrial Dynamical Time0.60section
Terrestrial Timerelated to historyTDT0.60section
Terrestrial Timerelated to historyIt0.60section
Terrestrial Timerelated to historyBarycentric Dynamical Time0.60section
Terrestrial Timerelated to historyTDB0.60section
Terrestrial Timerelated to historySolar0.60section
Terrestrial Timerelated to historyBoth0.60section
Terrestrial Timerelated to historyDoubts0.60section
Terrestrial Timerelated to historyIn0.60section

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