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Subject
- accretion1
- active galactic nuclei64
- astronomical models2
- astronomical object identification1
- astrophysical masers2
- atomic physics1
- atomic spectroscopy1
- bl lacertae objects1
- black holes5
- catalogs5
- ccd photometry1
- chemical abundances2
- co line emission5
- extinction1
- galaxies180
- galaxy classification systems5
- galaxy kinematics2
- gamma-ray astronomy3
- h alpha photometry2
- h ii regions4
