Kids are always asking questions, and sometimes their queries can throw any adult for a loop! Do you know the basics of popular subjects with your tots? We tested you on animals and dinosaurs, and now it's time to see what you know about facts more out of this world. We asked Dr. Renee Weber, a planetary scientist at NASA's Marshall Space Flight Center, to help us answer common questions your lil astronaut may ask you. How does your space knowledge stack up? Take our quiz and see!