Historic Comet Smashup Brought Water to Jupiter's Stratosphere

A large comet that peppered Jupiter two decades ago brought water into the giant planet's atmosphere, according to new research from the Herschel space observatory. Shoemaker-Levy 9 astounded astronomers worldwide when its 21 fragments hit Jupiter in June 1994. The event was predicted and observatories were trained on Jupiter as the impact occurred. The dark