... Jupiter s Great X Ray Spot . ... Credit: X-ray Image: R.Gladstone ( SwRI ), et al., Optical Image: Cassini Imaging Team , NASA Explanation: The Solar System's largest planet, gas giant Jupiter , is famous for its swirling Great Red Spot . ... In the left hand panel, a false-color image from the orbiting Chandra Observatory presents a corresponding x-ray view of Jupiter. The Chandra image shows clearly, for the first time, x-ray spots and auroral x-ray emission from the poles . ...