Subject
- infrared1
- interstellar cloud1
- interstellar reddening1
- morgan-keenan classification1
- nebulae1
- novae1
- observatory log1
- photovisual magnitude1
- redshifts1
- references1
- solar system1
- south galactic pole1
- space observatories1
- stellar ages1
- stellar evolutionary models1
- stellar masses1
- stellar spectral types1
- the sun1
- ultraviolet1
- ultraviolet sources1
