SwRI scientists collaborated on a French-led study that identified remarkably powerful polar winds in Jupiter’s stratosphere, expressed in this March 22, 2017, composite image. Using ALMA observations, the team discovered that the most remarkable jet (in red and blue) is aligned with Jupiter’s southern aurora, currently heavily studied at SwRI thanks to the SwRI-led UVS instrument. Wind speeds were measured up to 400 meters per second (900 miles per hour).