Dara O Briain and Professor Brian Cox celebrate our amazing night sky. They kick things off with the search for evidence of life on Mars and ask viewers for help to explore an uncharted area of the red planet's surface. Liz Bonnin reports live from NASA mission control to find out the latest findings of the Curiosity Rover, whilst Mark Thompson offers tips on how to observe the moons of Jupiter.

Dara and Brian's journey through the night sky continues with a look into the distant past, explaining how it is possible to chart the history of the universe by looking million of light years out into the depths of space. Meanwhile, Mark Thompson reveals what can be learned from the colours of the stars. At NASA, Liz Bonnin meets the team building the largest space telescope in the world, an instrument that's 100 times more powerful than the Hubble.

On the final night of their astronomical adventure, Brian and Dara discuss meteors, comets and asteroids and reveal how studying them reveals information about the origins of life on Earth. Meanwhile, Liz Bonnin meets the NASA team tasked with tracking any space objects on a collision course with Earth. The results of the experiment carried out by the Stargazing viewers - to explore an uncharted area on the surface of Mars - are also revealed.