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Can I see details on Venus?
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Can we hear sound on Titan?
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How close does a supernova need to be to damage the Earth's environment?
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How do solar flares affect airline pilots?
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How long is twilight on the Moon?
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If the sun went out and our atmosphere froze solid, what color would it be?
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Is it sensible to consider terraforming Mars?
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Is there oxygen in the atmospheres of other planets?
(Intermediate)
What are some of the effects of solar flares on Earth?
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What are the advantages and disadvantages of using a telescope in space?
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What color are meteors?
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What color is each planet?
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What is the hottest time of day?
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What was different on Mars in the past to allow liquid water to be present?
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Why are telescopes located in remote places?
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Why are the Moon and Sun sometimes orange or red?
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What is the difference between a "star" and a "sun"? (Beginner)
When was the last time all of the planets were aligned? (Beginner)
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Why are the Moon and Sun sometimes orange or red? (Beginner)
What is the significance of the Tropic of Cancer, Tropic of Capricorn, Arctic Circle and Antarctic Circle? (Beginner)
What is the difference between a "star" and a "sun"? (Beginner)
How far is each planet from Earth? (Intermediate)
Why do airplanes take longer to fly West than East? (Intermediate)
How do you measure the distance between Earth and the Sun? (Intermediate)
How does the position of Moonrise and Moonset change? (Intermediate)
Is the distance from the Earth to the Sun changing? (Advanced)
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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)
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What is the universe expanding into? (Intermediate)
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