Take the box that has the miniature planets of the solar system from the secret cabinet. Go to the globe. Click the box of planets on the indentations (the holes along the rim). The planets should now be along the outside. Now all you need to do is place them in the correct order. The planets as they are placed on the outside from left to right are: Pluto, Mercury, Mars, Venus, Earth, Neptune, Uranus, Saturn, and Jupiter. When done correctly, it opens to show William's key.