Jupiter shows intense X-ray emission associated with auroras in its polar regions (Chandra X-ray Observatory X-ray image on the left). The accompanying schematic illustrates how Jupiter's unusually frequent and spectacular auroral activity is produced. Observation period: 17 h, 24-26 February 2003. Credit: X-ray: NASA/CXC/MSFC/R. Elsner et al.; Illustration: CXC/M. Weiss.
