Scientists have detected mysterious, gyroscopic motion within the atmosphere of Saturn’s moon Titan that appears to be completely independent from its surface rotation.
Scientists from the University of Bristol made the discovery while analyzing sensor data from the NASA-ESA Cassini-Huygens mission’s flyby of the Saturnian moon. The researchers say they cannot explain the mysterious motion, which seems connected to the moon’s seasons, each lasting several Earth years.
Titan has long fascinated scientists due to its similarities to Earth. Such features include its rocky surface, lakes and rivers of methane and ethane with ocean-like waves, and a thick, carbon-rich atmosphere (a rarity within the solar system).
The team behind the latest discovery says their findings join a growing body of research suggesting Titan is not just Earth-like in appearance, “but an alien world with climate systems all its own.”
Mysterious Gyroscopic Motion of the Atmosphere and Other Titan Mysteries
Launched as a joint venture between NASA and the ESA in 1997, the long-range Cassini-Huygens probe spent the final 13 years studying Saturn and its moons in the infrared spectrum. Although the spacecraft made its final transmission in 2017 before intentionally crashing into Saturn, scientists are still making regular discoveries by combing through the mission’s treasure trove of scientific data. Previously, scientists relied on the mission’s data to debate Titan’s past and present habitability and whether the moon could support life.
For the current study, the University of Bristol team focused on data measuring the symmetry of Titan’s atmospheric temperature field. A comparison between atmospheric and surface data showed that the atmosphere isn’t centered on the moon’s pole as was expected. Instead, the data revealed an atmospheric shift over time that appeared to be aligned with Titan’s seasonal cycle. The correlation was particularly pronounced since a year on Titan lasts nearly 30 Earth years.
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