This series takes a fascinating new look at a very old universe. Fifty years after man first ventured into outer space, we examine the greatest secrets of the heavens. Each episode outlines how humans have explored the universe, and scrutinises the discoveries they have made.

We look at hi-tech space telescopes which record the violent birth of stars, robotic rovers which glimpse the red surface of Mars, and sophisticated NASA probes which delve into the mysterious make-up of comets.

As the earth churns ominously with the effects of global warming, this is a revealing and prescient journey into the heavens. From the planets to the stars and out to the edge of the unknown, history and science collide in this epic exploration of the Universe and its mysteries.

In this instalment of The Universe, we scrutinise the craterous surface of our moon. For thousands of years, mankind has found comfort in its presence. It has been a lantern for nocturnal travellers, a timekeeper for farmer and a location finder for sailors at sea.

For some cultures, it has even been a god. It is also the only cosmic body ever visited by human beings. Today, NASA is planning a permanent outpost there. We investigate the scientific origins of the moon, asking how it came to be. The answer is more astounding and spectacular than most residents of earth have ever imagined.