Earlier this week, it lookd like Pulto and Charon (the second bright light in the picture) would both be planets. But no, since they wouldn't let in Charon, Ceres and UB313 (Xena), they decided to kick-out Pluto.
So now, in 30 years, you will meet somebody and talk to them. And you can say, "Well... when I was born, there were 9 planets, not 8". And they will look at you like you are a million years old. You know how I know.
Cuz when I was born there were only 49 States. (I was born after Alaska and before Hawaii).