Dr. Sarah M. Hörst Planetary Scientist

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I am currently an Assistant Professor in the Department of Earth and Planetary Sciences at Johns Hopkins University where I am working to understand the formation and composition of planetary atmospheric hazes.

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I grew up “all over”, including 12 years in Great Falls, MT and high school in Gainesville, FL. I received a B.S. in Planetary Science and B.S. in Literature from the California Institute of Technology in 2004. While at Caltech, I worked with Dr. Michael Brown studying Europa and Titan. After graduating from Caltech, I worked at NASA’s Jet Propulsion Laboratory for a year with Dr. Ashwin Vasavada analyzing images of Saturn from the Imaging Science Subsystem (ISS) on the Cassini spacecraft. In 2011, I received my PhD from the University of Arizona where I studied the chemistry occurring in Titan’s atmosphere with Dr. Roger Yelle at the University of Arizona’s Lunar and Planetary Laboratory. After finishing my PhD, I was an NSF Astronomy and Astrophysics Postdoctoral Fellow working with Dr. Margaret Tolbert at the Cooperative Institute for Research in Environmental Sciences (CIRES) at University of Colorado-Boulder.




My primary research interest is atmospheric chemistry. In particular, I am interested in the complex organic chemistry occurring in the atmosphere of Titan. I am also interested in complex organics elsewhere in the solar system (and the universe!), whether they are produced in an atmosphere or on a surface.

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