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What kind of interference must astronomers contend with when observing?
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Are there telescopes that can see the flag and lunar rover on the Moon? (Beginner)
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Are there telescopes that can see the flag and lunar rover on the Moon? (Beginner)
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What is the significance of the Tropic of Cancer, Tropic of Capricorn, Arctic Circle and Antarctic Circle? (Beginner)
Is the Moon moving away from the Earth? When was this discovered? (Intermediate)
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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