posted on Jun, 12 2004 @ 07:50 AM
The Cassini spacecraft has made a close pass of the planet's mysterious moon Phoebe.
The US-European spacecraft made its closest approach to the moon on Friday at 2156 BST at a distance of 2,000km.
As the probe flies past, it will gather data that will tell scientists about Phoebe's internal structure, its composition and its history.
Phoebe is 220km across and Cassini's images of it will be far superior to those taken by Voyager 2 in 1981.
By determining the mass and volume of the moon, the scientists can also determine its density. This will tell them whether the moon is solid all the
way through or is essentially a mass of rubble.