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