Cassini bristles with hardware to gather data about Saturn's stormy atmosphere, molten core and mysterious rings.
It can measure magnetic fields and radio waves, charged particles, cosmic dust, infrared and ultraviolet light. It also has wide-angle and narrow-angle cameras.
It sends up to four gigabits of information to Earth per day.
CASSINI'S KEY PARTS
Boom carrying instrument to measure magnetic fields
Two cameras will take 300,000 pictures of the planet
Radioactive power source
Engines (one is a back-up)
Thrusters used for small changes of direction or speed
Huygens probe will land on Saturn's largest moon, Titan
Plasma spectrometer measures charged particles