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Subject
- apparent magnitude2
- catalogs2
- ccd photometry1
- chemical abundances1
- ddo photometry1
- faint blue stars1
- galaxies3
- galaxy clusters2
- galaxy planes1
- horizontal branch stars1
- k stars2
- late-type stars1
- metallicity1
- milky way galaxy1
- optical astronomy5
- photographic magnitude2
- photometry6
- proper motions1
- quasars1
- radial velocity3
