Pluto no longer a planet

There are officially only eight planets in the Solar System, as Pluto no longer qualifies. Before there was no official definition of a planet, but large objects are continually being discovered and the International Astronomical Union decided it was time to have a definition:

Much-maligned Pluto doesn't make the grade under the new rules for a planet: "a celestial body that is in orbit around the sun, has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a . . . nearly round shape and has cleared the neighborhood around its orbit."

Pluto is automatically disqualified because its oblong orbit overlaps with Neptune's.

I think this is a good idea as another proposed definition would have created dozens more planets:

Pluto would keep its planethood while three other bodies would be added, including Pluto's moon Charon, the asteroid Ceres and Brown's object 2003 UB313, which he nicknamed Xena.

By Brown's own count, 14 of his discoveries besides Xena are in the running for planethood. That could make Brown the most prolific planet hunter.

It would have been silly to have both Pluto and its moon considered planets.