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Terrestrial Time replaced Ephemeris Time, ET
in Astronomy
Transit Traverse
in Astronomy
171077171076
Similar to TT
AST - Apparent Solar Time
ASWG - Astronomical Science Working Group
ASWG - ATST
Advanced Technology Solar Telescope Science Working Group
ATM - Apollo Telescope Mount
ATM - Amateur Telescope Maker
ATM - Amateur Telescope Making
AU - Alternate Universe
View all in Astronomy