terrestrial time
"Terrestrial time" is an astronomical time standard used for precise measurements and calculations in celestial events, distinct from civil timekeeping.
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Definition
C2Astronomy
(technical)A time standard used for precise measurements of celestial events, defined by the International Astronomical Union and based on the SI second.
Example
- Astronomers rely on terrestrial time for accurate positioning of celestial objects.
- Terrestrial time is crucial for synchronizing observations made from different locations on Earth.
C2Timekeeping
(technical)A uniform time scale that serves as a reference for calculating the positions of celestial objects, accounting for Earth's irregular rotation.
Example
- Terrestrial time provides a consistent framework for astronomers to predict celestial events.
- Unlike Coordinated Universal Time, terrestrial time is not used for everyday civil purposes.
Similar
Terms that have similar or relatively close meanings to "terrestrial time":
ephemeris timeterrestrial telescopeterra firmalocal timeprimary timewall timereference timeflat timetransition time