The reason Pluto lost its planet status in 2006 is not valid, researchers from the University of Florida argue.
The International Astronmical Union, which declassified Pluto, defines a planet as something that “clears” its own orbit, making it the largest gravitational force in its orbit.
In a study published by the Icarus journal, researchers from UCF say this requirement was published once before, in 1802, but the standard has since been disproved.
Researchers point out that no planet is able to clear its orbit.
The study recommends defining a planet as something that is large enough to become “spherical in shape.”