September 29, 1994: In the Jupiter campaign, scientists wanted to see how the comet collisions affected the Jovian aurorae, rapid and irregular displays of colorful light in a planetís night sky caused by the leakage of charged particles from the magnetosphere into the atmosphere. Following the impacts, some of the resulting debris became electrically charged and traveled along Jupiterís magnetic field lines and created new aurorae in Jupiterís northern hemisphere, as shown in this image. Scientists had never before observed aurorae this far south of where aurorae are typically seen in Jupiterís northern hemisphere.
Credit: NASA and John T. Clarke (Univ. of Michigan)