20 years ago, from Jul 16-22, comet Shoemaker-Levy 9 impacted #Jupiter, leaving impact marks http://t.co/7J2KD78qNF pic.twitter.com/5NMPt523bh
— Observing Space (@ObservingSpace) July 15, 2014
20 years ago, from July 16-22, 1994, comet Shoemaker-Levy 9 impacted Jupiter, leaving impact marks…