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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 all the planets orbit in the same plane? (Intermediate)
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If gravity isn't a force, how does it accelerate objects? (Advanced)
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What is the difference between a "star" and a "sun"? (Beginner)
How does the location of sunrise and sunset change throughout the year? (Advanced)
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How are light and heavy elements formed? (Advanced)
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Is the Moon moving away from the Earth? When was this discovered? (Intermediate)
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What is the difference between a "star" and a "sun"? (Beginner)
How are light and heavy elements formed? (Advanced)
Why do the planets orbit the sun? (Beginner)
How do you measure the distance between Earth and the Sun? (Intermediate)
How long could life on Earth survive if the Sun stopped shining? (Beginner)
How does the position of Moonrise and Moonset change? (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)
Which planet is most similar to Earth? (Intermediate)
Are there telescopes that can see the flag and lunar rover on the Moon? (Beginner)
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What color is each planet? (Intermediate)
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Is the Moon moving away from the Earth? When was this discovered? (Intermediate)
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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)
When was the last time all of the planets were aligned? (Beginner)
How long does it take for the Sun's light to reach us? (Beginner)
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