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- International Astronomical Union. Symposium (163)
- Society of Photo-optical Instrumentation Engineers (73)
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- International Astronomical Union (54)
- European Southern Observatory (35)
- American Astronomical Society (27)
- Astronomical Society of the Pacific (24)
- Matthews, Mildred Shapley (17)
- Tyson, Robert K., 1948- (13)
- Conference on Astronomical Data Analysis Software and Systems (12)
- Laser Institute of America. (11)
- Heck, A. (André) (10)
- Livio, Mario, 1945- (10)
- Optical Society of America (10)
- Sterken, C. (Christiaan) (10)
- United States Naval Observatory. Nautical Almanac Office (10)
- Canadian Astronomical Society (9)
- North Atlantic Treaty Organization. Scientific Affairs Division (9)
- Renzini, Alvio (9)
- Aller, Lawrence H. (Lawrence Hugh), 1913- (8)
- Astronomical Society of the Pacific. Summer Scientific Meeting (8)
- Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun (8)
- Crawford, David Livingstone, 1931- (8)
- Gehrels, Tom, 1925- (8)
- Longair, M. S., 1941- (8)
- Narlikar, Jayant Vishnu, 1938- (8)
- Pogorelov, Nikolai V. (8)
- Sandage, Allan (8)
- American National Standards Institute. (7)
- American Society of Mechanical Engineers (7)
- Audit, Edouard (7)
- Bass, Michael (7)
- Gibbs, Michael G. (7)
- International Commission for Optics (7)
- Lang, Kenneth R. (7)
- Leung, Kam-Ching (7)
- secretariat, the Laser Institute of America. (7)
- Adelman, S. J. (6)
- American Institute of Physics (6)
- American National Standards Institute (6)
- Burbidge, Geoffrey R. (6)
- Combes, F. (6)
- ESO Workshop (6)
- Great Britain. Nautical Almanac Office (6)
- Heuvel, Edward Peter Jacobus van den, 1940- (6)
- Kuiper, Gerard Peter, 1905- (6)
- Kwok, S. (Sun) (6)
- Milone, E. F., 1939- (6)
- Philip, A. G. Davis (6)
- Reipurth, Bo (6)
- Secretariat, the Laser Institute of America. (6)
- Siegmund, Oswald H. W. (6)
- Space Telescope Science Institute (U.S.) (6)
- Tayler, Roger John (6)
- 近藤, 陽次 (6)
- Barnes, Jeannette (5)
- Feigelson, Eric D. (5)
- Ferraz-Mello, Sylvio (5)
- Hawking, Stephen W., 1942- (5)
- Hubený, I. (Ivan) (5)
- International Astronomical Union. Commission 34 (5)
- Jaschek, Carlos (5)
- Kitchin, C. R. (Christopher R.) (5)
- Leitherer, Claus (5)
- Manning, James G. (5)
- Meylan, G. (Georges) (5)
- Mihalas, Dimitri, 1939- (5)
- Mitton, Jacqueline (5)
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- Osterbrock, Donald E. (5)
- Peterson, B. M. (Bradley M.) (5)
- Press, William H. (5)
- Schramm, David N. (5)
- Shull, J. Michael (5)
- Society of Photo-optical Instrumentation Engineers. (5)
- Tenorio-Tagle, G. (Guillermo), 1947- (5)
- United States. National Aeronautics and Space Administration (5)
- Williams, D. A. (David Arnold), 1937- (5)
- Zank, Gary P. (5)
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- Appenzeller, I. (Immo), 1940- (4)
- Audouze, Jean, 1940- (4)
- Babu, Gutti Jogesh, 1949- (4)
- Beckman, J. E. (4)
- Binney, James, 1950- (4)
- Brandt, John C. (4)
- Breckinridge, Jim B. (Jim Bernard), 1939- (4)
- Burton, W. B. (William Butler), 1940- (4)
- COSPAR (4)
- Canary Islands Winter School on Astrophysics (4)
- Chandrasekhar, S. (Subrahmanyan), 1910- (4)
- Djorgovski, S. G. (4)
- ESO/ST-ECF Data Analysis Workshop (4)
- Ealey, Mark A. (4)
- Egret, D. (Daniel) (4)
- European Space Agency (4)
- European Workshop on White Dwarfs (4)
- Giacconi, Riccardo (4)
- Grosbøl, P. J. (Preben J.) (4)
- Hayes, D. S. (Donald S.) (4)