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Subject
- infrared astronomy[remove]1,316
- infrared sources826
- spectroscopy518
- photometry324
- infrared photometry232
- surveys181
- optical astronomy166
- galaxies162
- radio astronomy154
- interstellar medium129
- young stellar objects117
- redshifted87
- molecular clouds81
- active galactic nuclei80
- x-ray sources80
- h ii regions77
- line intensities73
- radial velocity68
- radio sources67
- chemical abundances65
