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Subject
- active galactic nuclei1
- asteroids1
- be stars1
- chemical abundances1
- chemically peculiar stars1
- early-type stars1
- galaxies12
- galaxy clusters1
- galaxy planes1
- h ii regions2
- infrared astronomy16
- infrared photometry9
- infrared sources25
- interstellar medium2
- line intensities1
- magellanic clouds2
- milky way galaxy1
- molecular clouds1
- nebulae1
- observational astronomy1