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Subject
- accretion1
- apparent magnitude1
- astronomical models1
- astronomical object identification2
- atomic spectroscopy1
- be stars1
- chemical abundances2
- diffuse molecular clouds[remove]21
- early-type stars3
- emission line stars1
- excitation rates1
- extinction2
- galaxies2
- h i line emission7
- h ii regions3
- infrared photometry3
- interferometry1
- interstellar medium7
- interstellar reddening3
- magellanic clouds1
