The actor shares his passion for the Cassini mission which studied Saturn and its moons.
The engineers and astronomers approach the biggest milestone in their 20-year project.
The team launch the Herschel telescope, the biggest telescope ever sent to space.
Farewell to Cassini - the latest and final results of the 20 year mission to Saturn.
Matt Taylor talks to Jim Al-Khalili about the Rosetta comet mission.
Michele Dougherty tells Jim Al-Khalili why she diverted the Cassini mission to Saturn.
Andrew Luck-Baker meets the scientists behind NASA's next giant telescope.
Billed as 'the sexiest space mission ever', did Rosetta's probe land safely on its comet?