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Subject
- a stars1
- absolute magnitude6
- accretion1
- active galactic nuclei21
- apparent magnitude10
- astrometry3
- astronomical models1
- astronomical object identification2
- astronomical reference materials1
- black holes5
- catalogs24
- ccd photometry1
- chemical abundances19
- co line emission10
- dwarf stars2
- early-type stars1
- effective temperature1
- extinction1
- galaxies162
- galaxy classification systems32
