List of Astronomy Acronyms - A


  • A&A – (publication) Astronomy & Astrophysics, a European scientific journal
  • AAA – (organization) Amateur Astronomers Association of New York
  • AAO – (organization) Australian Astronomical Observatory (prior to 1 July 2010: Anglo-Australian Observatory)
  • AAS – (organization) American Astronomical Society
  • AAT – (telescope) Anglo-Australian Telescope
  • AAVSO – (organization) American Association of Variable Star Observers
  • ABBA – ADC Backend For Bolometer Array
  • ABRIXAS – (observing program) A BRoadband Imaging X-ray All-sky Survey
  • AC – (catalog) Catalogue Astrographique
  • ACE – (spacecraft) Advanced Composition Explorer
  • ACIS – (instrumentation) Advanced CCD Imaging Spectrometer, an instrument on the Chandra X-Ray Observatory
  • ACM – (meeting) Asteroids, Comets, and Meteors
  • ACP – (instrumentation) – Aerosol Collector and Pyrolyser, an instrument on the Huygens probe
  • ACS – (instrumentation) Advanced Camera for Surveys, an instrument on the Hubble Space Telescope
  • ACV – (celestial object) Alpha Canes Venatici, a class of rotating variable stars with strong magnetic fields named after Alpha Canum Venaticorum (Cor Caroli), the archetype for the class
  • ACYG – (celestial object) Alpha CYGni, a class of rotating variable stars named after Alpha Cygni (Deneb), the archetype for the class
  • ADAF – (astrophysics terminology) Advection Dominated Accretion Flow, a mechanism by which matter is slowly accreted onto a black hole
  • ADC – (organization) Astronomical Data Center
  • ADEC – (organization) Astrophysics Data Centers Executive Council, an organization that provides oversight for the Astrophysics Data and Information Services
  • ADF – (organization) Astrophysics Data Facility
  • ADS – (catalog) Aitken Double Stars
  • ADIS – (organization) Astrophysics Data and Information Services
  • ADS – (organization) Astrophysics Data Service, an organization that maintains an online database of scientific articles
  • AFGL – (organization) Air Force Geophysics Laboratory, a research laboratory now part of the United States Air Force Research Laboratory
  • AFOEV – (organization) Association française des observateurs d'étoiles variables
  • AG – (organization) Astronomische Gesellschaft
  • AGAPE – (observing program) Andromeda Galaxy and Amplified Pixels Experiment, a search for microlenses in front of the Andromeda Galaxy
  • AGB – (celestial object) Asymptotic Giant Branch, a type of red giant star
  • AGK – (catalog) Astronomische Gesellschaft Katalog
  • AGN – (celestial object) Active Galactic Nucleus
  • AGU – (organization) American Geophysical Union
  • AIM – (spacecraft) Aeronomy of Ice in the Mesosphere, a spacecraft that will study the Noctilucent clouds
  • AIPS – (software) Astronomical Image Processing System
  • AJ – (publication) Astronomical Journal
  • ALaMO – (organization) Automated Lunar and Meteor Observatory
  • ALEXIS – (instrumentation) Array of Low Energy X-ray Imaging Sensors
  • ALMA – (telescope) Atacama Large Millimeter/Sub-millimeter Array
  • ALPO – (organization) Association of Lunar and Planetary Observers
  • AMANDA – (telescope) Antarctic Muon And Neutrino Detector Array, a neutrino telescope
  • AMASE – (software) Astrophysics Multi-spectral Archive Search Engine
  • AMS – (organization) American Meteor Society
  • AN – (publication) Astronomische Nachrichten, a German scientific journal
  • ANS – (telescope) Astronomical Netherlands Satellite
  • ANS – (organization) Astro News Service
  • ANSI – (organization) American National Standards Institute
  • AO – (instrumentation) Adaptive Optics
  • AOR – (instrumentation) Astronomical Observation Request
  • ApJ – (publication) Astrophysical Journal
    • ApJL – (publication) Astrophysical Journal Letters
    • ApJS – (publication) Astrophysical Journal Supplement Series
  • APM – (instrumentation/catalog), Automatic Plate Measuring machine, a machine for making measurements from photographic plates; also, a catalog based on measurements by the machine
  • APO – (organization) Apache Point Observatory
  • APOD – (data) Astronomy Picture of the Day
  • APT – (telescope) Automated Patrol Telescope
  • ARC – (organization) Ames Research Center
  • ARC – (organization) Astrophysical Research Consortium
  • ASA – (organization) Astronomical Society of the Atlantic
  • ASI – (organization) Agenzia Spaziale Italiana
  • ASIAA – (organization) Academia Sinica Institute of Astronomy and Astrophysics
  • ASP – (organization) Astronomical Society of the Pacific
  • ASTRO – (spacecraft) Autonomous Space Transport Robotic Operations
  • ATA – (telescope) Allen Telescope Array, a radio interferometer array developed by the SETI Institute to search for possible signals from extraterrestrial life
  • ATCA – (telescope) Australia Telescope Compact Array
  • ATM – (person) hobbyist engaged in Amateur telescope making (may also refer to the book of the same title, Amateur Telescope Making)
  • AU – (measurement) Astronomical Unit, the distance between the Earth and the Sun
  • AUASS – (organization) Arab Union for Astronomy and Space Sciences
  • AURA – (organization) Association of Universities for Research in Astronomy
  • AWCA – (meeting) American Workshop on Cometary Astronomy, an older name for the International Workshop on Cometary Astronomy
  • AXP – (celestial object) Anomalous X-Ray Pulsar
  • AXAF – (telescope) Advanced X-ray Astrophysics Facility, an older name for the Chandra X-ray Observatory

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