Of all the rocky planets, Mercury is the smallest and densest, the one with the oldest surface, and the one with the largest daily surface temperature variations. It is also the least explored! Join NASA as we unlock the secrets of Mercury.
On Nov. 8, 2006, telescopes in North America and other parts of the world captured the image of a little dot crossing the face of the sun. That dot was Mercury, and its passing between the Earth and sun is known as a transit.
Watch "Space School Musical," the tale of Hannah on a trip through the solar system; then put on your own version of the play. No performing experience is needed -- just follow the suggestions in the guide and have fun with it!