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Subject
- spectroscopy[remove]2,065
- galaxies668
- optical astronomy532
- redshifted482
- photometry465
- chemical abundances377
- infrared astronomy342
- line intensities281
- radial velocity259
- surveys237
- quasars235
- infrared photometry209
- active galactic nuclei199
- ultraviolet astronomy148
- galaxy clusters138
- infrared sources134
- interstellar medium119
- giant stars117
- effective temperature115
- metallicity113