Subject
- milky way galaxy2
- morgan-keenan classification2
- peculiar variable stars2
- x-ray sources2
- young stellar objects2
- apparent magnitude1
- atomic physics1
- diffuse molecular clouds1
- dwarf stars1
- hst photometry1
- interstellar medium1
- kron-cousins photometry1
- molecular clouds1
- narrow band photometry atomic spectroscopy1
- nebulae1
- planetary nebulae1
- protostars1
- spectral energy distribution1
- spectrophotometry1
- star atlases1
