Top ten questions (all questions)
- What's going to happen on December 21st 2012? (viewed 2132700 times)
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- At what speed does the earth move around the sun? (viewed 585788 times)
- Is the Moon moving away from the Earth? When was this discovered? (viewed 564970 times)
- How far is each planet from Earth? (viewed 469839 times)
- When will Halley's Comet return? (viewed 426709 times)
- How long does it take for the Sun's light to reach us? (viewed 391130 times)
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- Why do the planets orbit the sun? (viewed 380076 times)
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