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Subject
- absolute magnitude2
- agn1
- apparent magnitude4
- astrometry2
- astronomical models3
- astronomical object identification5
- astrophysical masers1
- be stars1
- catalogs1
- ccd photometry1
- chemical abundances4
- co line emission3
- cosmology9
- diffuse molecular clouds4
- early-type stars3
- effective temperature2
- emission line stars3
- extinction3
- galactic and extragalactic astronomy7
- galaxies16
