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Keck's Changing View of Uranus (2004) From 2001 to 2004, Uranus's motion around the Sun has changed its orientation as seen from Earth in these images taken through Keck II's K prime filter. The four images show how the Adaptive Optics system has improved over time. Imke de Pater, Seran Gibbard, Heidi Hammel / W. M. Keck Observatory