ADU means Astronomical Distance Unit in
Astronomy
Similar to ADU
ABF - Astronomische Beeldverwerkings Faciliteiten
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
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