Question

why is the Pluto is draft planet​

Answer 1

$\large{\huge{\underline \mathbb{ \overline { \mid{ \blue{Answer} \mid}}}} }$

• The International Astronomical Union (IAU) downgraded the status of Pluto to that of a dwarf planet because it did not meet the three criteria the IAU uses to define a full-sized planet. Essentially Pluto meets all the criteria except one—it “has not cleared its neighboring region of other objects.”

@MissTranquillity

Answer 2

Answer:

Before Pluto was discovered, it was predicted. Astronomers had observed that massive objects can affect the orbits of its neighbors, and, after seeing deviations in the orbits of Uranus and Neptune, assumed something substantial existed beyond their orbits.

When Pluto was spotted, it was thought to be the predicted object and was identified as a ninth planet.

A few decades later, astronomers started discovering more and more objects around other stars and didn’t know whether to call them planets or not. There appeared to be a need to define what a planet means, and that led to what some people consider Pluto’s demotion to a dwarf planet.