1) What is the closest planet to the Sun?
2) How many moons does Earth have?
3) Who was the first person to set foot on the Moon?
4) What is the name of the first satellite launched into space?
5) What gas makes up most of the atmosphere on Saturn?
6) What is the name of the closest galaxy to the Milky Way?
7) What is the name of the most distant known galaxy in the universe?
8) What is a planet's rotation period measured in?
9) How long does light take to travel from the Sun to Earth?
10) Who was the first American woman in space?