Adams, Fred; Laughlin, Greg July 13, 2006 | Astronomy and Astrophysics 373 1 : 139—152 |
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"Memorandum of Understanding Between The European Space Agency and The United States National Aeronautics and Space Administration", reprinted in NASA SP-2001-4407: Exploring the Unknown, Chapter 3, Document III-29, p | "A spiral nebula as a stellar system, Messier 31" |
University of Maryland Department of Astronomy.
2The technician who performed the test noted an unexpected gap between the field lens and its supporting structure in the corrector and filled it in with an ordinary metal washer | "Telescope Is Set to Peer at Space and Time" |
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"The radial velocity of the Andromeda Nebula" | Also includes other NASA astronomy programs |
Bulletin of the American Astronomical Society 26: 911.
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