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Subject
- active galactic nuclei6
- astrometry3
- astronomical models6
- astronomical object identification2
- b stars2
- be stars1
- bp stars1
- cataclysmic variable stars5
- catalogs5
- chemical abundances8
- early-type stars3
- effective temperature8
- emission line stars1
- galaxies16
- galaxy classification systems2
- gamma-ray astronomy2
- giant stars1
- globular star clusters1
- gravitational lensing1
- h i line emission2
