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Subject
- apparent magnitude[remove]479
- absolute magnitude110
- galaxies103
- optical astronomy91
- photometry83
- redshifted70
- surveys63
- variable stars63
- astrometry59
- galaxy clusters48
- spectroscopy44
- radial velocity42
- infrared photometry40
- photographic magnitude40
- active galactic nuclei38
- catalogs37
- quasars35
- galaxy classification systems33
- proper motions33
- effective temperature31
