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Terrestrial Time replaced Ephemeris Time, ET
in Astronomy
Transit Traverse
in Astronomy
171077171076
Similar to TT
BIS - British Interplanetary Society
BLO - Bl Lac Object
BLOB - Binary Large Object
BM - Blue Moon
BMO - Black Moving Object
BOOK - Bio Optical Organized Knowledge
BOSS - Bullet Of Super Speed
View all in Astronomy