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Subject
- absolute magnitude2
- accretion1
- active galactic nuclei74
- apparent magnitude4
- astrometry5
- astronomical models2
- astronomical object identification24
- astrophysical masers10
- bl lacertae objects24
- carbon stars1
- catalogs7
- chemical abundances1
- co line emission3
- effective temperature1
- emission line stars1
- ephemerides1
- exoplanets1
- galactic center2
- galaxies109
- galaxy classification systems10