APT in Astronomy could mean:
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Similar to APT
AAS - Archaeology, Astronautics, and SetiAAT - Anglo Australian Telescope
AAVSO - American Association of Variable Star Observers
ABB - After the Big Bang
ABBA - ADC Backend For Bolometer Array
ABF - Astronomische Beeldverwerkings Faciliteiten
AC - Ascendant Cusp
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