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Dr. Josh Colwell is a Planetary Scientist and Professor of Physics at the University of Central Florida. Since 2011 he has been Associate Chair of the Department of Physics, Assistant Director of the Florida Space Institute, and Director of the Center for Microgravity Research. He came to UCF in 2006 from the Laboratory for Atmospheric and Space Physics at the University of Colorado where he earned his Ph.D. in Astrophysical, Planetary and Atmospheric Sciences. His research interests are in the origin and evolution of the solar system with a particular emphasis on planet formation, asteroids, planetary rings, comets, and interplanetary dust. He was a Co-Investigator on the international Cassini mission to Saturn that orbited the ringed planet from 2004-2017. He studies the structure and dynamics of Saturn’s rings with data from Cassini. He has led experiments that have flown on the Space Shuttle, the International Space Station, suborbital rockets, parabolic airplane flights, and is developing a CubeSat for launch in 2019. His other interests include running, writing, and movies. He was a comet advisor for, and actor in, the Dreamworks picture “Deep Impact” and has been a walker in “The Walking Dead” among other background acting activities.