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Subject
- extinction[remove]273
- photometry133
- infrared photometry88
- optical astronomy72
- galaxies58
- interstellar medium57
- milky way galaxy35
- spectroscopy35
- stellar spectral types35
- molecular clouds33
- surveys33
- infrared astronomy31
- redshifted31
- wide-band photometry31
- chemical abundances30
- stellar distance30
- infrared sources29
- stellar masses26
- young stellar objects25
- radial velocity20
