1 ผลลัพธ์ สำหรับ *ephemeris time*
หรือค้นหา: ephemeris time, -ephemeris time-

WordNet (3.0)
terrestrial time(n) (astronomy) a measure of time defined by Earth's orbital motion; terrestrial time is mean solar time corrected for the irregularities of the Earth's motions, Syn. terrestrial dynamical time, TT, ephemeris time, TDT

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