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What color would Mars be if you were standing on it?
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What do astronauts do all day in the International Space Station?
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What do astronauts eat in space? Can they grow food?
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What would happen if a human were exposed to space without wearing a spacesuit?
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Why do photos of space taken from space never show any stars?
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Why don't astronauts sublimate in space?
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Will astronauts ever be able to go ice-skating on Europa?
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What is the difference between a "star" and a "sun"? (Beginner)
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Can moons have moons? (Intermediate)
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How far is each planet from Earth? (Intermediate)
Can artificial gravity be created in space? (Intermediate)
How do you measure the distance between Earth and the Sun? (Intermediate)
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At what speed does the Earth move around the Sun? (Beginner)
Is the distance from the Earth to the Sun changing? (Advanced)
What color is each planet? (Intermediate)
What is the significance of the Tropic of Cancer, Tropic of Capricorn, Arctic Circle and Antarctic Circle? (Beginner)
How far is each planet from Earth? (Intermediate)
Can artificial gravity be created in space? (Intermediate)
What is the difference between a "star" and a "sun"? (Beginner)
How do you measure the distance between Earth and the Sun? (Intermediate)
Why do airplanes take longer to fly West than East? (Intermediate)
At what speed does the Earth move around the Sun? (Beginner)
When was the last time all of the planets were aligned? (Beginner)
Why do the planets orbit the sun? (Beginner)
What's going to happen on December 21st 2012? (Intermediate)
What color is each planet? (Intermediate)
At what speed does the Earth move around the Sun? (Beginner)
How far is each planet from Earth? (Intermediate)
Is the Moon moving away from the Earth? When was this discovered? (Intermediate)
How do you measure the distance between Earth and the Sun? (Intermediate)
Why do the planets orbit the sun? (Beginner)
What is the significance of the Tropic of Cancer, Tropic of Capricorn, Arctic Circle and Antarctic Circle? (Beginner)
How long does it take for the Sun's light to reach us? (Beginner)
When was the last time all of the planets were aligned? (Beginner)
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