The Achromatic Phase Knife Coronagraph: Theory and First Laboratory Test
The Ackley City Batholith, southeastern Newfoundland: Evidence for crystal versus liquid-state fractionation
The acoustic and magnetic solar cycle
The acoustic telescope
The acoustic wave equation in the expanding universe. Sachs-Wolfe theorem
The acquisition mode of the Halley Multicolor Camera for the Giotto mission
The Acquisition of a Lexicon from Paired Phoneme Sequences and Semantic Representations
The acquisition, guiding, and wavefront sensing units for the Large Binocular Telescope
The Acraman Impact Structure, South Australia
The ACS Fornax Cluster Survey
The ACS LCID Project: RR Lyrae Stars and Cepheids in Local Group Galaxies
The ACS Virgo Cluster Survey: Spectroscopy and Dynamics of Virgo Galaxies
The ACT Distributed Computing Environment v. 2.3 - Administrator's Guide and Instructions for Further Development
The ACT Vision Mission Study Simulation Effort
The Active Magnetospheric Particle Tracer Explorers (AMPTE) program
The active Main Marmara Fault
The Active Nucleus and 200-KPC X-Ray Jet in NGC 6251
The active phase of substorms according to ground and satellite data
The active primary mirror assembly for the SOAR telescope
The active solar corona