when did pluto become a planet?

Answer 1

1930

Answer 2

Wikipeidia quotes

"Since the discovery of Pluto in 1930, controversy has surrounded its status as a planet. The discovery of other trans-Neptunian objects (notably 2003 UB313, nicknamed "Xena", which is even larger than Pluto) focused debate on Pluto and the definition of a planet. On August 24, 2006, the IAU ratified a resolution that resulted in Pluto being reclassified as a dwarf planet."

Answer 3

The story of Pluto's discovery begins with Percival Lowell, the founder of Lowell Observatory in Flagstaff, Arizona. Lowell was obsessed with the notion of a "trans-Neptunian" planet, which he believed could be detected from the effect it would have on Neptune's orbit. After all, the planet Neptune had been discovered in 1846 by examining irregularities in the orbit of Uranus. Astronomers reasoned that the mystery planet's apparent gravitational influence on Uranus and Neptune could be used to calculate where in the sky it should be found.

Until they came up with a name, Pluto was called Planet X . Planet X was subsequently christened Pluto in 1930, a name suggested by Venetia Burney, an 11-year-old girl in Oxford, England. This name was favored by the astronomers of Lowell Observatory because its first 2 letters were the initials of Percival Lowell. In hindsight, the discovery had nothing to do with Lowell's calculations based on perceived perturbations to the orbits of Uranus and Neptune. We now know that those perturbations were not real, and that Pluto's mass is much too small to have produced such perturbations in any case. The discovery owes more to the remarkable persistence and diligence of Clyde Tombaugh in his careful search of the sky.

Answer 4

I think when he realizes he was a dog just like Goofy and he could not talk, then decided to leave Mickey Mouse and go around the world to find an answer for everybody who has the same doubt.

If Pluto is a dog and not a planet, what's Goofy, anyway?

Answer 5

June 6th, 1931

Answer 6

Obviously WAY before you were born. I'm thinking in the neighborhood of 300 billion years before you were born.

Answer 7

1930 I BELIEVE

Answer 8

after he tapped uranus....

Answer 9

idk, all i know is that theyre thinking of not considering it a planet anymore....