It seems as though Planet Y is an alternate theory to Planet X, which are both hypothetical 9th planets. The headline makes it sound like they theorize 10 planets already.

Uranus is the 7th planet, followed by Neptune.

My grocery stores have them with the bulk coffee, nuts, and candy section. I think they have two spouts in case you want them whole or ground. Maybe you’re in the wrong aisle? They also grind fresh nut butter, so not just coffee, either.