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What kind of interference must astronomers contend with when observing?
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What month was it when Odysseus saw Orion in 1000BC?
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What percent of the time can astronomers observe without interference from the Moon?
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If gravity isn't a force, how does it accelerate objects? (Advanced)
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How are light and heavy elements formed? (Advanced)
How do you measure the distance between Earth and the Sun? (Intermediate)
Why do the planets orbit the sun? (Beginner)
How long could life on Earth survive if the Sun stopped shining? (Beginner)
How does the position of Moonrise and Moonset change? (Intermediate)
At what speed does the Earth move around the Sun? (Beginner)
How does the location of sunrise and sunset change throughout the year? (Advanced)
Which planet is most similar to Earth? (Intermediate)
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