The annular groove phase mask coronagraph: an achromatic optical vortex
The Anomalous Component of Cosmic Rays in the 3-D Heliosphere
The anomalous nature of Ivigtut lead
The anomalous nuclear component in the three-dimensional heliosphere
The Anomalous X-Ray Pulsar 4u 0142+61
The Antarctic 'ozone hole' in comparison with the behavior of ozone in the Arctic
The Antarctic achondrite ALHA 76005 - A polymict eucrite
The Antarctic Cryptoendolithic Ecosystem - Relevance to Exobiology
The Antarctic Meteorite Location and Mapping Project (AMLAMP) Geographic Information System (GIS)
The Antarctic meteorite Yamato 74123 - A new ureilite
The Antarctic Plateau Interferometer
The ANTARES project
The Antennae
The Anti Matter Spectrometer (AMS-02):. a Particle Physics Detector in Space
The Anti-Tail of Comet C/1995 O1 (Hale-Bopp) in 1997/1998
The antiquity indicator argon-40/argon-36 for lunar surface samples calibrated by uranium-235-xenon-136 dating
The AOCS Framework
The Aouelloul crater, Mauritania: On the problem of confirming the impact origin of a small crater
The Apache Point Observatory Lunar Laser-ranging Operation (APOLLO): Two Years of Millimeter-Precision Measurements of the Earth-Moon Range
The APEX Telescope Large Area Survey of the Galaxy (ATLASGAL)