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Subject
- observational astronomy[remove]18
- galaxies8
- galactic and extragalactic astronomy6
- optical astronomy6
- ultraviolet astronomy4
- infrared astronomy3
- optical astronomy3
- surveys3
- galatic evolution2
- solar system astronomy2
- cosmology1
- dark matter1
- galactic evolution1
- galaxy evolution1
- galaxy evolution and structure1
- globular clusters1
- nebulae1
- planetary nebulae1
- planets1
- star formation1
