tdt

• TDT

• tdt

• TDT

• tdt

• TDT

• tdt

• TDT

• tdt

tdt

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

Synonyms:

• terrestrial time
• TT
• terrestrial dynamical time
• TDT
• ephemeris time