<Li> The probe landed on the surface of Titan at about 10.6 ° S, 192.3 ° W around 12: 43 UTC in SCET (2 hours 30 minutes after atmospheric entry). (1 .) </Li> <P> There was a transit of the Earth and Moon across the Sun as seen from Saturn / Titan just hours before the landing . Huygens entered the upper layer of Titan's atmosphere 2.7 hours after the end of the transit of the Earth, or only one or two minutes after the end of the transit of the Moon . However, the transit did not interfere with the Cassini orbiter or Huygens probe, for two reasons . First, although they could not receive any signal from Earth because it was in front of the Sun, Earth could still listen to them . Second, Huygens did not send any readable data to the Earth; it transmitted data to the Cassini orbiter, which relayed the data received to the Earth later . </P> <P> Huygens had six complex instruments aboard that took in a wide range of scientific data after the probe descended into Titan's atmosphere . The six instruments are: </P> <P> This instrument contains a suite of sensors that measured the physical and electrical properties of Titan's atmosphere . Accelerometers measured forces in all three axes as the probe descended through the atmosphere . With the aerodynamic properties of the probe already known, it was possible to determine the density of Titan's atmosphere and to detect wind gusts . The probe was designed so that in the event of a landing on a liquid surface, its motion due to waves would also have been measurable . Temperature and pressure sensors measured the thermal properties of the atmosphere . The Permittivity and Electromagnetic Wave Analyzer component measured the electron and ion (i.e., positively charged particle) conductivities of the atmosphere and searched for electromagnetic wave activity . On the surface of Titan, the electrical conductivity and permittivity (i.e., the ratio of electric displacement field to its electric field) of the surface material was measured . The HASI subsystem also contains a microphone, which was used to record any acoustic events during probe's descent and landing; this was the first time in history that audible sounds from another planetary body had been recorded . </P>

The huygen's probe found that on titan there were