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Subject
- observational astronomy[remove]46
- galaxies19
- galactic and extragalactic astronomy16
- stars11
- optical astronomy10
- planets10
- solar system astronomy10
- cosmology9
- nebulae9
- stellar astronomy9
- optical astronomy6
- ultraviolet astronomy6
- surveys4
- uv4
- infrared astronomy3
- optical3
- and infrared astronomy2
- galatic evolution2
- star formation2
- dark matter1
