An American astronomer, Clyde Tombaugh, discovered

just search google

explanation:

google is the best

the following men who did not in the unification of italy were.

a) giuseppe mazzini

c) alexander ll

the other two men were camilo cavour and giuseppe garibaldi they the unification of italy by yielding territories in the italian unification. in 1861 italy was declared a united-nation state under the sardinian king victor immanuel ll.

answer; ///any two strangers are likely to share many coincidental similarities;