Clue 1: I was born in Streator, Illinois, in 1906. I died on January 17, 1997. I built my own telescopes for my work as an astronomer.
Clue 2: I discovered Pluto in 1930, when I was working as an assistant at the Lowell Observatory, in Arizona. I was 24 years old.
Clue 3: I also discovered several stars and a supercluster of galaxies.
Who am I? _________________