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December 20, 2011
- Image of Comet C/2011 W3 (Lovejoy) as seen by the Hinode Satellite
- Image of Comet C/2011 W3 (Lovejoy) as seen by the Hinode Satellite
- A ‘Rose’ Made of Galaxies
- Tropical Storm Washi
- A ‘Rose’ Made of Galaxies
- Artist’s Concept of Kepler-20f
- Artist’s Concept of Kepler-20e
- APOD: 2011 December 20 – NGC 253: The Sculptor Galaxy