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Subject
- spectroscopy[remove]3,160
- galaxies794
- optical astronomy721
- photometry611
- infrared astronomy518
- redshifted502
- chemical abundances463
- radial velocity391
- line intensities355
- quasars300
- ultraviolet astronomy267
- infrared photometry265
- surveys249
- active galactic nuclei229
- interstellar medium189
- infrared sources152
- multiple stars146
- galaxy clusters142
- giant stars142
- wide-band photometry142
