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Terrestrial Time replaced Ephemeris Time, ET
in Astronomy
Transit Traverse
in Astronomy
171077171076
Similar to TT
ALTS - Astronomy Lunch Time Seminar
AMSU - Advanced Mass Spectrometry Unit
AOA - ASCA Online Arxiv
AOSS - AURA Observatory Support Services
APOD - Astronomy Picture Of the Day
APT - Astronomers Proposal Tools
APT - Automatic Photometric Telescope
View all in Astronomy