Which aspect of his vision did Clyde Tombaugh use to discover the dwarf planet Pluto?
A)Motion perception
B)Depth perception
C)Size constancy
D)Shape constancy

Question

Which aspect of his vision did Clyde Tombaugh use to discover the dwarf planet Pluto?​
A)Motion perception​
B)​Depth perception
C)​Size constancy
D)​Shape constancy

Quizplus · Accepted Answer

Clyde Tombaugh used motion perception to discover Pluto. He compared photographic plates taken of the same area of the sky several nights apart and looked for a moving object, which turned out to be Pluto.

Which Aspect of His Vision Did Clyde Tombaugh Use to Discover