Comet Shoemaker-Levy 9 began crashing into Jupiter in 1994. The comet was first observed by Carolyn and Eugene M. Shoemaker and David Levy on March 24, 1993. The comet had already broken apart into about 21 pieces, and scientists observed the explosions through telescopes, including the Hubble telescope. The last piece of Comet Shoemaker-Levy 9 crashed into Jupiter on July 22, 1994. Scientists learned a great deal about Jupiter because the impacts caused ripples traveling at 260 miles per second on the planet’s surface.