ESA Science & Technology04-Jul-2005 14:26:49


Last Update: 15 Feb 2005

The Voyager 1 and 2 spacecraft first determined the average density of Titan in the 1980s. Accurate measurements of the radius, derived from signal loss timings, and the mass, from the gravitational pull experienced by the spacecraft, gave a mean density of 1881 kgm-3 (almost twice the density of water ice).

Despite deriving this figure no one is entirely certain on the composition of the interior although it is likely to be a combination of rock and ice. Furthermore, no magnetic field has been detected from Titan suggesting that an iron core is not present.

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