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Apollo Telescope Mount
in Astronomy
Amateur Telescope Maker
in Astronomy
Amateur Telescope Making
in Astronomy
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Similar to ATM
AC - Ascendant Cusp
AC - Active Coronae
ACA - Atacama Compact Array
ACIT - Automatic Comet Imaging Telescope
ACRIM - Active Cavity Radiometer Irradiance Monitor
ACS - Advanced Camera for Surveys
ACT - Astrographic Catalog Tycho
View all in Astronomy