Tomorrow, the much anticipated Huygens Probe will rendezvous with the Saturn moon Titan. It has been making a 22 day journey to the moon, and end up entering the atmosphere sometime on January 14th somewhere at 11h15 CET.
Titan is one of the remaining puzzles of the solar system - while Cassini's imaging cameras and radar instrument have begun to reveal the details of its surface, the Huygens probe will be the first spacecraft to venture beneath Titan's thick clouds.