Comet Shoemaker-Levy NUMBER@1 -LRB- SL9 , formally designated D/1993 NUMBER@2 -RRB- was a comet that broke apart and collided with LOCATION@1 in July of NUMBER@3 , providing the first direct observation of an extraterrestrial collision of solar system objects .

Comet Shoemaker-Levy NUMBER@1 -LRB- SL9 , D/1993 NUMBER@2 -RRB- was a comet that broke apart and smashed into LOCATION@1 in July of NUMBER@3 .
