Planets around other stars were undetectable science fiction only twenty years ago. Now, as new detection methods have been brought to bear, hundreds of extra-solar planets have been discovered both near and far from Earth. Discover what makes a planet 'Earth-like'. Explore planets which are unlike any we have seen before. Extreme planets aren't science fiction any more, but science fact.
Accompany a proton on a grandiose journey through space and time, investigating the explosive forces and events of our known universe.