The Huygens probe measures 2.7 metres across and is built like a shellfish: a hard shell to protect a delicate interior from extreme temperatures experienced during the descent through the atmosphere.
It consists of two parts: the Entry Assembly Module and the Descent Module.
The Entry Assembly Module carries the equipment to control Huygens after the separation from Cassini, and has a shield that will act as a brake and as thermal protection.
The Descent Module contains the scientific instruments. The probe will use three different parachutes in sequence during the descent.