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How far is each planet from Earth? (Intermediate)
When was the last time all of the planets were aligned? (Beginner)
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What is the difference between a "star" and a "sun"? (Beginner)
Why do airplanes take longer to fly West than East? (Intermediate)
How does the location of sunrise and sunset change throughout the year? (Advanced)
At what speed does the Earth move around the Sun? (Beginner)
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At what speed does the Earth move around the Sun? (Beginner)
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