Subject
- absolute magnitude1
- apparent magnitude1
- astrometry1
- astronomical models1
- early-type stars1
- eclipsing binary stars1
- exoplanets1
- gamma-ray astronomy1
- giant stars1
- globular star clusters1
- hst photometry1
- interstellar medium1
- kron-cousins photometry1
- molecular clouds1
- nebulae1
- o stars1
- photographic photometry1
- pulsars1
- radio continuum emission1
- radio galaxies1
