Eugene Parker, the S. Chandrasekhar Distinguished Service Professor Emeritus in Physics at the University of Chicago, discusses his scientific research on the sun, including his landmark discovery of the solar wind. Nearly 60 years ago, Parker first coined the term solar wind to describe the stream of electrically charged particles emitted by the sun. On May 31, 2017, NASA honored Parker by naming its first mission to the sun—the Parker Solar Probe—in his honor. (Video by UChicago Creative)