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?