Goodbye Pluto. Goodbye Earth.

So Pluto is no longer a planet. Fine.

But apparently, the redefinition may hit a little closer to home.

Stern sees problems ahead for the IAU definition.

Under the current wording, Earth does not qualify as a planet because it has not "cleared the neighborhood around its orbit," he said. Objects called near-Earth asteroids orbit the sun at roughly the same from our home star as Earth.