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Subject
- absolute magnitude2
- accretion1
- active galactic nuclei[remove]227
- agn1
- apparent magnitude4
- astrometry2
- astronomical models1
- astronomical object identification17
- astronomical reference materials1
- astrophysical masers11
- bl lacertae objects35
- black holes1
- catalogs3
- co line emission2
- correlation1
- galaxies46
- galaxy classification systems12
- galaxy clusters1
- galaxy kinematics1
- gamma-ray astronomy25