My little Galileo

Lucy's really into outer space right now. 

After watching an episode of Cat in the Hat featuring planets ...
Lucy: "but Mom, they didn't discuss Ceres and the other dwarf planets." 

On a winding road behind another car ...
Lucy: "When we go around these curves, why is that car tilting to the side like Uranus?" 

She's 3. How does she know more than me (and PBS) about planets?