Subject
- pre-main sequence stars3
- stellar associations3
- two-color diagrams3
- ccd photometry2
- metallicity2
- stellar populations2
- surveys2
- apparent magnitude1
- astrometry1
- early-type stars1
- extinction1
- h i line emission1
- hst photometry1
- infrared astronomy1
- infrared sources1
- interferometry1
- kron-cousins photometry1
- late-type stars1
- morgan-keenan classification1
- multiple stars1
