When did scientists prove that Pluto exists?

Answer 1

The dwarf planet Pluto was discovered on February 18, 1930. It was discovered by an astronomer named Clyde Tombaugh who was working at the Lowell Observatory in Arizona at the time. William H. Pickerin contributed to Pluto being found.

Answer 2

Pluto was discovered in 1930 by an astronomical assistant named Clyde Tombaugh. Tombaugh was hired to work for the astronomers at Lowell Observatory in Arizona. Tombaugh would take photographic plates of portions of the night sky, then take another photo of the same location several weeks later. He would compare the two photos to detect and objects that "moved". There were hundreds of objects detected, most were asteroids. But in 1930 a larger object was located about 39 astronomical units from the sun. The object discovered turned out to be smaller than what they expected to find (a ninth planet was assumed to be very large, like Jupiter, Saturn, Uranus and Neptune). This smaller object was classified as a planet, and named Pluto. Since the discovery of Pluto its status as a planet has been under debate. And in 2006 it was decided to drop Pluto as a planet and classify it as a "dwarf planet". Clyde Tombaugh died in 1997, and did not live to see his discovery eliminated from the status of a planet.

Answer 3

Pluto was discovered in 1930 by astronomer Clyde Tombaugh through observations at the Lowell Observatory in Arizona. It was considered the ninth planet in our solar system until its reclassification as a dwarf planet in 2006 by the International Astronomical Union.

Answer 4

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

Answer 5

February 18, 1930

Answer 6

pluto was discovered in the year 1930

Answer 7

When they saw it, in 1930.

Answer 8

When they discovered it, in 1930.

Answer 9

1930