Solar system montage with eight planets

William Blume

Retired, Jet Propulsion Laboratory

William Blume retired from the Caltech/NASA Jet Propulsion Laboratory after 38 years of work in mission design and systems engineering.

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Remembering planetary scientist Michael A’Hearn

Planetary scientist Michael A’Hearn passed away on Monday, May 29, leaving a remarkable legacy in cometary science—but even more importantly in the careers of many younger scientists who flourished with his encouragement and mentorship.