... Credit: NASA , ESA , H. Hammel (Space Science Institute, Boulder, Co.), and the Jupiter Impact Team Explanation: This sprawling dark marking is Jupiter's latest impact scar, a debris plume created as a small asteroid or comet disintegrated after plunging into the gas giant's atmosphere. Located in Jupiter's south polar region, the new feature was discovered by Australian amateur astronomer Anthony Wesley on July 19. ... July . ... Publications with keywords: Jupiter - impact - comet - asteroid . ...