Massive bruise on Jupiter probably caused by asteroid By comparing a scar on Jupiter with that left by the 1994 Comet Shoemaker-Levy 9 impact, astronomers believe that 1,600ft wide asteroid slammed into the planet, with the force of a few thousand nuclear bombs.
By Paul Sutherland, Skymania News / June 3, 2010
A mystery object that slammed into Jupiter last year leaving a massive bruise was probably an asteroid, astronomers believe.
The collision was first spotted by Australian amateur astronomer Anthony Wesley as we reported in July last year.