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\title{Science AMA Series: Hi Reddit, I'm Sarah H\selectlanguage{ngerman}örst, Professor of Planetary
Science at Johns Hopkins University, here to talk about the outer solar
system (especially Titan). Ask me anything!\selectlanguage{english}}



\author[1]{AmGeophysicalU-AMA }%
\author[1]{r/Science AMAs}%
\affil[1]{Affiliation not available}%


\vspace{-1em}



  
  \date{April 24, 2026}


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\selectlanguage{english}
\begin{abstract}
I am Sarah H\selectlanguage{ngerman}örst, Assistant Professor in the Department of Earth and
Planetary Sciences at Johns Hopkins University. I study planetary
atmospheric chemistry and have spent most of my career trying to unravel
the mysteries of Saturn's largest moon Titan and much of my work has
been inspired. My group also studies exoplanets, Europa, Saturn, Pluto,
and Venus. We are use experiments, models, and analysis of telescope and
spacecraft data to improve our understanding of the role atmospheres
play in the origin and evolution of life and the habitability of a
planet. We are trying to answer questions like how far can organic
chemistry proceed in the absence of life? You can learn more about us
and our work at www.sarahhorst.com. I hope to answer lots of questions
about the solar system and how we study it. I will back at 1 pm ET to
answer your questions, See you all soon!%
\end{abstract}\selectlanguage{ngerman}%



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