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Subject
- spectroscopy19
- galaxies17
- stars11
- surveys11
- galaxy-formation10
- galaxy-masses10
- galaxy-photometry10
- h-alpha-photometry10
- h-beta-photometry10
- infrared-photometry10
- interstellar-line-emission10
- theoretical-models10
- absolute-magnitude8
- galaxy-ages7
- redshift-surveys6
- dk1545
- light curves5
- optical spectroscopy5
- active-galactic-nuclei4
- history-of-astronomy3