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Subject
- spectroscopy23
- stars18
- galaxies17
- surveys12
- galaxy-formation10
- galaxy-masses10
- galaxy-photometry10
- h-alpha-photometry10
- h-beta-photometry10
- infrared-photometry10
- interstellar-line-emission10
- theoretical-models10
- absolute-magnitude8
- galaxy-ages7
- astronomy-web-services6
- redshift-surveys6
- active-galactic-nuclei5
- data retrieval3
- history-of-astronomy3
- milky-way-galaxy3