David H. Levy David H. Levy ( born May 22 , 1948 ) is a Canadian astronomer and science writer who co-discovered Comet Shoemaker -- Levy 9 in 1993 , which collided with the planet Jupiter in 1994 .
David H. Levy David H. Levy ( born May 22 , 1948 ) is a Canadian astronomer and science writer . He co-discovered Comet Shoemaker -- Levy 9 in 1993 , which collided with the planet Jupiter in 1994 .