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Subject
- astrometry1
- astrophysical masers2
- chemical abundances2
- co line emission1
- early-type stars1
- effective temperature1
- extinction4
- galactic center[remove]37
- galaxies1
- gamma-ray astronomy2
- gravitational lensing1
- h i line emission1
- h ii regions2
- infrared astronomy5
- infrared photometry11
- infrared sources1
- interferometry2
- interstellar medium8
- late-type stars1
- metallicity2
