Original: On December 25 , 2004 the Huygens probe separated from the orbiter at approximately 02:00 UTC ; it reached Saturn 's moon Titan on January 14 , 2005 where it made an atmospheric descent to the surface and relayed scientific information .
Simplified: On December 25 2004 the Huygens probe separated from the orbiter at more or less 02:00 UTC .