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Subject
- surveys3
- active-galactic-nuclei2
- astrophotography2
- history-of-astronomy2
- infrared-photometry2
- observational-cosmology2
- surface-photometry2
- active-galaxies1
- broad-band-photometry1
- catalogs1
- dwarf-galaxies1
- early-type-galaxies1
- galaxy-clusters1
- galaxy-distances1
- galaxy-evolution1
- galaxy-planes1
- milky-way-galaxy1
- quasars1
- radio-interferometry1
- seyfert-galaxies1