When Will Pluto Complete Its First Orbit Since Its Discovery?

Astronomers will have to wait a while to celebrate the first complete orbit of Pluto since its discovery.

Pluto was discovered on Feb. 18, 1930, using the Lowwell Observatory in Flagstaff, Arizona. American astronomer Clyde Tombaugh found a moving object clearly beyond the orbit of Neptune. That object was later called Pluto, the ruler of the Greek underworld in that culture’s mythology.

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