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Subject
- galaxies[remove]4,327
- photometry1,949
- optical astronomy1,019
- spectroscopy797
- redshifted771
- catalogs745
- infrared photometry661
- surveys609
- infrared sources540
- galaxy classification systems529
- radio galaxies511
- galaxy clusters441
- radial velocity336
- radio astronomy322
- active galactic nuclei305
- wide-band photometry283
- chemical abundances264
- x-ray sources249
- sloan photometry234
- hst photometry204
