Abbreviation Definition
AMSUAdvanced Mass Spectrometry Unit
ANIAnterior Nebulae Integration
ANSAstronomical Netherlands Satellite
AOAstronomical Observatory
AOAASCA Online Arxiv
AOASArkansas/Oklahoma Astronomical Society
AOBAstronomical Observatory Belgrade
AOBAstronomical Observatory of Belgrade
AOSSAURA Observatory Support Services
APAstral Projection
APASSAAVSO Photometric All-Sky Survey
APDAAstronomical Photographic Data Archive
APODAstronomy Photo of the Day
APODAstronomy Picture Of the Day
APOLLOApache Point Observatory Lunar Laser-ranging Operation
APPLEAriane Passenger Payload Experiment
APSAstronomy Planetary Science
APSAstronomy & Planetary Science
APTAstronomers Proposal Tools
APTAstro-Photography Tool

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