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Observatory

View the solar system
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Welcome to the Observatory

Facts and figures
A family picture of the Solar System, with information about its members.

Articles
Explanations of astronomical phenomena:

  • Seasons Understanding how and why there are seasons on Earth.
  • Eclipses What is an eclipse? When do the happen? Why are they so rare?
  • Phases Why does the Moon change its appearance? What is the complete cycle? Do planets also display phases?
  • Retrograde motion of planets What is "retrograde motion"? Do planets really stop and reverse directions?


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