Question of the Week!!!!!

Tuesday was the anniversary of the the discovery of Pluto, our formerly ninth planet. Answer these questions, astronomers, to win valuable prizes. What belt is Pluto in? Who discovered Pluto? What year was Pluto downgraded from planet status, and what organization did that? What is Pluto's moon called?  And which came first, the discovery and naming of the planet Pluto, or the cartoon dog Pluto?