Rock and roll music will be boldy blasted where none has been heard before when NASA's Cassini-Huygens spacecraft completes it journey to Saturn's moon, Titan.

The US-European vessel is carrying a 14-minute CD loaded with music from two little-known French artists, who will have the honour of having their tracks broadcast to any alien ears that may be listening.

Earthlings, on the other hand, will be able to bop along to the tunes on the Internet site from December 21 as they follow the mission online.