American research scientist Claudia Joan Alexander was born on May 30, 1959 in Vancouver, Canada, but grew up in Santa Clara, California. She earned her BA in geophysics at the University of California, Berkeley, her masters in geophysics & space physics from UCLA, and a PhD in atmospheric, oceanic & space sciences at the University of Michigan.

Alexander went to work at the United States Geological Survey, and then to NASA's Jet Propulsion Laboratory (JPL). She was the science coordinator for an instrument aboard the Galileo spacecraft and in the mission's final phase, was the project manager. As a planetary scientist she researched a number of topics, and also became the science coordinator on the Cassini mission to Saturn. In 2000 she became the project manager for NASA's contribution in the European Rosetta mission to Comet Churyumov-Gerasimenko.

As a scientist, she was also a science communicator and an advocate for women and minorities in STEM fields. She mentored young people, especially girls of color. And in addition to being a scientist, she was a published author, writing children's books and science fiction.

Claudia Alexander worked with the Rosetta mission until her untimely death from cancer in 2015. Her colleagues named a feature on Comet C-G after her. The Director of NASA's JPL wrote in tribute:
Claudia brought a rare combination of skills to her work as a space explorer. Of course with a doctorate in plasma physics, her technical credentials were solid. But she also had a special understanding of how scientific discovery affects us all, and how our greatest achievements are the result of teamwork, which came easily to her. Her insight into the scientific process will be sorely missed.

Mona Evans
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