David Adam, science correspondent
Tuesday February 15, 2005
The Guardian
That's no moon, it's a space station. Actually it's Saturn's satellite Mimas, which bears an uncanny resemblance to the Death Star - the planet-destroying space station in the film Star Wars.
Scientists at Nasa's jet propulsion laboratory in California have released a new image of Mimas, which was snapped by the Cassini spacecraft in orbit around the ringed planet.
Mimas is one of the innermost moons of Saturn. Its most prominent feature is a giant crater some 6 miles deep and 80 miles across, covering almost a third of the moon's diameter, probably caused by an enormous asteroid impact.
Traces of fracture marks can be seen on the opposite side. If the asteroid had been bigger or faster, the moon would probably have been split in two.
At the centre of the crater is a central mountain almost as high as Mount Everest. It was also formed by the asteroid impact when pulverised and molten material rebounded upwards like a splashing water droplet.
http://www.guardian.co.uk/space/article/0,14493,1414923,00.html