Multiple choice

Pluto was discovered in 1930 by

  1. Daniel Defo

  2. C. Young

  3. Clyde Tombaugh

  4. Robert Frost

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Pluto was discovered on February 18, 1930, by astronomer Clyde Tombaugh at the Lowell Observatory in Flagstaff, Arizona.