Google Adsense Performance on Planets & Moons, What iS that?

I just opened Google Adsense Dashbord, and surprised by Top Planet And Moons. What is that? Is somebody out there has internet and click ads on my site?

Hoho…. it just prank. Today 1 April huh? Yah..hahah  this is might be April Fool’s joke. #LOL