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Subject
- absolute magnitude23
- accretion1
- active galactic nuclei62
- apparent magnitude39
- astrometry21
- astronomical models10
- astronomical object identification21
- astronomical reference materials1
- atomic spectroscopy1
- bl lacertae objects4
- black holes9
- catalogs122
- ccd photometry24
- chemical abundances83
- chemically peculiar stars1
- co line emission4
- diffuse molecular clouds2
- dwarf stars1
- early-type stars1
- effective temperature7