Now only four months away from its encounter with Saturn, NASA's Cassini spacecraft will be delivering weekly postcards as it approaches the ringed planet. Here's a 1024x768 desktop wallpaper image of Saturn, taken by Cassini on February 9, 2004, when the spacecraft was 69.4 million kilometres away - the smallest details visible are 540 kilometres across. Cassini will go into orbit around Saturn on July 1, 2004, and spend the next four years studying the planet and its moons.