Subject
- stellar distance2
- stellar radii2
- ultraviolet astronomy2
- atomic physics1
- bl lacertae objects1
- exoplanets1
- extinction1
- galaxy clusters1
- interstellar reddening1
- multiple stars1
- o stars1
- ob stars1
- radio galaxies1
- solar system1
- stellar masses1
- supernovae1
- the sun1
- two-color diagrams1
- ultraviolet photometry1
- variable stars1
