Almost every picture of the Solar System you've seen is wrong — on purpose. Today you'll see it for real.

In this lesson you'll:

• compare the Sun and planets drawn to the same scale
• feel how far apart they are — and how long light takes to cross that gap
• launch your own satellite to discover why things orbit
• find out what really causes seasons, Moon phases and eclipses

About 50 minutes. Every step has something to play with: try it, read the short explanation, then press Done to move on.