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- Galaxies--Congresses (40)
- Astrophysics--Congresses (5)
- Milky Way--Congresses (5)
- Cosmology--Congresses (4)
- Infrared astronomy--Congresses (4)
- Interstellar matter--Congresses (4)
- Stars--Formation--Congresses (4)
- Cosmic background radiation--Congresses (3)
- Molecular clouds--Congresses (3)
- Absorption spectra--Congresses (2)
- Black holes (Astronomy)--Congresses (2)
- Cosmochemistry--Congresses (2)
- Disks (Astrophysics)--Congresses (2)
- Quasars--Spectra--Congresses (2)
- Radio astronomy--Congresses (2)
- Radio sources (Astronomy)--Congresses (2)
- Stars--Clusters--Congresses (2)
- Stars--Congresses (2)
- Stars--Populations--Congresses (2)
- Aaronson, Marc A., 1950-1987 (1)
- Active galactic nuclei--Congresses (1)
- Astrometry--Congresses (1)
- Astronomical spectroscopy--Congresses (1)
- Astrophysical jets--Congresses (1)
- Big bang theory--Congresses (1)
- Galactic center--Congresses (1)
- Galactic halos--Congresses (1)
- Galaxies--Catalogs--Congresses (1)
- Galaxies--Evolution--Congresses (1)
- Galaxies--Measurement--Congresses (1)
- Galaxies--Spectra--Data processing--Congresses (1)
- Gases--Congresses (1)
- Giacconi, Riccardo (1)
- Interstellar magnetic fields--Congresses (1)
- Interstellar matter--Optical properties--Congresses (1)
- Münch Galindo, Guido (1)
- Orion Nebula--Congresses (1)
- Quasars--Congresses (1)
- Radio astrophysics--Congresses (1)
- Red shift--Congresses (1)
- Spectral energy distribution--Measurement--Congresses (1)
- Stars--Catalogs--Congresses (1)
- Stars--Evolution--Congresses (1)
- Stars--Proper motion--Congresses (1)
- Ultraviolet astronomy--Congresses (1)