Portal:Astronomy/Picture/6 June 2005
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![](http://up.wiki.x.io/wikipedia/commons/thumb/d/dd/Chain_of_impact_craters_on_Ganymede.jpg/300px-Chain_of_impact_craters_on_Ganymede.jpg)
The collision of Comet Shoemaker-Levy 9 with Jupiter in 1994 was the first time astronomers had observed a collision between two Solar System bodies. This chain of craters on Jupiter's moon Ganymede provides evidence that comets must quite frequently be fragmented by the planet's gravity before colliding with it or its moons.