Comet of the Century
Comets have fascinated and terrified us for thousands of years. Traditionally seen as harbingers of doom, they can cast a spell on some of us even today. But for scientists comets are a fascinating opportunity to learn more about our solar system and us. Now a city-sized chunk of ice and rock is hurtling towards us - comet ISON and it could create the most spectacular sight in our skies for decades.