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- Astronomy--Congresses (43)
- Astrophysics--Congresses (6)
- International Astronomical Union--Congresses (6)
- Cosmology--Congresses (3)
- Astronomical Society of Australia--Congresses (1)
- Astronomy in art (1)
- Astronomy in literature (1)
- Astronomy--Environmental aspects--Congresses (1)
- Astronomy--Periodicals (1)
- Astronomy--Research--Congresses (1)
- Astronomy--Societies, etc.--Directories (1)
- Copernicus, Nicolaus, 1473-1543--Congresses (1)
- Cosmic rays--Congresses (1)
- Disks (Astrophysics)--Congresses (1)
- Environmental degradation--Congresses (1)
- Fricke, W. (Walter), 1915- (1)
- Infrared equipment--Congresses (1)
- International Astronomical Union--Directories (1)
- International Astronomical Union. General Assembly (21th : 1991 : Buenos Aires,Argentina) (1)
- International Astronomical Union. General Assembly--Congresses (1)
- Many-body problem--Congresses (1)
- McDonald, Frank B. (Frank Bethune) (1)
- Moon--Exploration--Congresses (1)
- Nonlinear theories--Congresses (1)
- Nuclear physics--Congresses (1)
- Orbiting astronomical observatories--Congresses (1)
- Outer space--Exploration--Congresses (1)
- Particle (Nuclear physics)--Congresses (1)
- Relativity (Physics)--Congresses (1)
- Science--Congresses (1)
- Solar system--Congresses (1)
- Southern sky (Astronomy) (1)
- Space astronomy--Congresses (1)
- Space sciences--Congresses (1)
- Speckle metrology--Congresses (1)
- Speckle--Congresses (1)
- Strömgren, Bengt, 1908- (1)