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Subject
- ultraviolet astronomy[remove]510
- spectroscopy267
- galaxies148
- photometry130
- optical astronomy113
- redshifted88
- quasars73
- line intensities57
- x-ray sources51
- surveys49
- infrared photometry46
- active galactic nuclei42
- interstellar medium42
- infrared astronomy40
- wide-band photometry37
- the sun30
- chemical abundances29
- catalogs25
- infrared sources25
- astronomical models20
