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…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.