TAI means International Atomic Time
Temps Atomique International in
Astronomy
Similar to TAI
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
AQR - Aquarius
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