Horst Keller

Horst Uwe Keller is a German physicist and astronomer known for his work in cometary and planetary research, especially spacecraft instrumentation for missions such as Giotto, Rosetta, SMART-1, and Dawn. He worked at the Max Planck Institute for Aeronomy/Solar System Research and received major honors including the Stern-Gerlach Prize and the Christiaan Huygens Medal.