Once you leave the rocky worlds of the inner Solar System ... using a bowling ball! And see how all the elements were finally put together in the computer – to reveal the planets as never ...

Watch this video to find out more about the Earth, planets in our Solar System and other planets far off in outer space. From up here on the International Space Station I get a great view of Earth.

There may be an undiscovered planet in the outer solar system whose presence is revealed by the strange orbit of objects beyond the eighth planet Neptune. The tantalizing prospect of a ninth ...