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Subject
- catalogs[remove]858
- galaxies744
- photometry265
- surveys173
- redshifted166
- galaxy classification systems163
- optical astronomy161
- infrared photometry95
- astrometry92
- galaxy clusters85
- optical observation81
- redshifted / redshift68
- spectroscopy65
- radial velocity60
- radio astronomy56
- sloan photometry54
- infrared sources51
- radio sources43
- x-ray sources43
- apparent magnitude37
