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Subject
- galactic and extragalactic astronomy[remove]23
- observational astronomy22
- galaxies14
- stellar astronomy12
- solar system astronomy11
- cosmology8
- stars8
- nebulae7
- planets7
- surveys6
- optical astronomy3
- infrared astronomy2
- star formation2
- ultraviolet astronomy2
- variable stars2
- dark matter1
- exoplanet astronomy1
- galactic evolution1
- galatic evolution1
- galaxy evolution and structure1
