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Comet Shoemaker–Levy 9 - Wikipedia
Comet Shoemaker-Levy 9 | Astronomy, Impacts & History
Comet Shoemaker-Levy 9: The backstory and its impact
P/Shoemaker-Levy 9 - Science@NASA
Comet Shoemaker-Levy Homepage (JPL) - NASA Solar System Exploration
Comet Shoemaker-Levy 9 - NASA Solar System Exploration
Shoemaker-Levy 9 impact on Jupiter 30 years ago - EarthSky
The Lasting Impacts of Comet Shoemaker-Levy 9 - Science@NASA
What the Shoemaker-Levy 9 Impact Taught Us
Comet Shoemaker-Levy 9's Epic Crash with Jupiter in Pictures