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Subject
- surveys87
- observational astronomy34
- 27
- galaxies16
- observation10
- optical astronomy10
- ultraviolet astronomy10
- galactic and extragalactic astronomy8
- optical astronomy8
- nearby galaxies6
- spectroscopy5
- infrared astronomy4
- radio astronomy4
- star formation4
- stars4
- galatic evolution3
- submillimeter astronomy3
- active-galactic-nuclei2
- galaxies: evolution2
- galaxies: formation2