The Ultimate Solar System Quiz
Calling all aspiring intergalactic explorers!
Which planets are the ice giants of the Solar System?
One year on Mercury is equal to how many days on Earth?
Which planet in the Solar System is the only planet to spin clockwise on its axis?
Who was the first human to walk on the moon?
What's the largest moon in the Solar System?
How many of the Solar System planets have rings?
Why is Pluto not considered a planet?
What's the biggest telescope ever sent into space?
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