David H. Levy
David H . Levy ( born May 22 , 1948 ) is a Canadian amateur astronomer , science writer and discoverer of comets and minor planets , who co-discovered Comet Shoemaker–Levy 9 in 1993 , which collided with the planet Jupiter in 1994 . 
<triplet> David H. Levy <subj> May 22, 1948 <obj> date of birth <triplet> Comet Shoemaker–Levy 9 <subj> comet <obj> instance of