What began 11 years ago has now come to a spectacular end. At the end of April, the NASA space probe MESSENGER slammed into the surface of Mercury at 14,000 kilometers an hour after orbiting the small, terrestrial planet for four years.
The mission sent back thousands of images and reams of valuable data, helping scientists improve predictions on both Mercury's geological history and its make-up. And in a surprise find, the probe also detected both water ice and organic molecules on the planet’s surface. Tomorrow Today looks back at one of the most successful space missions in recent history.