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\title{Hi Reddit, I'm Mike Liemohn, a Professor in the Department of Climate
and Space Sciences and Engineering at the University of Michigan, here
to talk about the many ways space can kill you (or satellites,
electricity), AMA!}



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


\vspace{-1em}



  
  \date{April 23, 2026}


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\begin{abstract}
I'm Mike Liemohn, a Professor in the Department of Climate and Space
Sciences and Engineering (http://clasp.engin.umich.edu/) at the
University of Michigan (umich.edu). You've probably seen Gravity, The
Martian, or The Fantastic Four, so you know that outer space is a
dangerous place. But isn't outer space a vacuum of nothingness? Beyond
no air to breathe, what else could possibly hurt you? It turns
out\ldots{}lots! I investigate the physics at work in the
almost-nothingness of our solar system. I am also the Editor in Chief of
the Journal of Geophysical Research -- Space Physics2169-9402/) a
leading journal in this field of understanding the Sun, solar eruptions,
magnetic storms, the radiation belts, and the aurora at Earth and other
planets. I am also currently teaching a very fun course at U-M called
SPACE 101: Intro to Rocket Science. I hope to have an engaging
discussion with you about the fascinating physics happening in the
near-emptiness of outer space, and explore the many ways that space
might pose a danger to astronauts, to satellites, or even to power grids
here on Earth. I'll be back at 12 pm ET to answer your questions, Ask Me
Anything! The AGU AMA series is conducted by the Sharing Science
(sharingscience.org) program. Sharing Science: By scientists, for
everyone. More at sharingscience.agu.org.%
\end{abstract}%



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