Subject
- active galactic nuclei12
- chemical abundances12
- dwarf stars12
- exoplanets12
- galaxy classification systems12
- photographic photometry12
- magellanic clouds11
- stellar ages11
- stellar masses11
- effective temperature10
- occultation10
- stellar associations10
- x-ray sources10
- gravitational lensing8
- gamma-ray astronomy7
- infrared sources7
- standard stars7
- late-type stars6
- line intensities6
- planetary nebulae6
