terrestrial time, TT, terrestrial dynamical time, TDT, ephemeris time(noun)
(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
What does TDT stand for? -- Explore the various meanings for the TDT acronym on the Abbreviations.com website.
The numerical value of TDT in Chaldean Numerology is: 3
The numerical value of TDT in Pythagorean Numerology is: 8
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