1) Who discovered Pluto?
a) Nicholas Copernicus
b) Galileo Galilei
c) Johannes Kepler
d) Clyde Tombaugh
2) When was Pluto discovered?
a) 1930
b) 1900
c) 1850
d) 1630
3) How many years does Pluto take to orbit the Sun?
a) 160
b) 184
c) 248
d) 512