An image of Titan taken by the Cassini spacecraft during a flyby<\/p>\n
NASA\/JPL\/SSI\/Val Klavans<\/p>\n<\/div>\n<\/figcaption><\/figure>\n<\/p>\n
Titan\u2019s plains may be covered in up to a metre of fluffy, organic \u201csnow\u201d. About 65 per cent of the surface of Saturn\u2019s huge moon is made up of strangely uniform and flat plains, and they seem to be coated in a porous, dry layer of particles that have fallen from the sky.<\/p>\n
The surface of Titan is difficult to study from afar because it is obscured by a thick, hazy atmosphere. The Cassini spacecraft, which orbited Saturn from 2004 to 2017, managed to take a closer look using radar. Now, Alexander Hayes at Cornell University in New York state and his colleagues have analysed the radar data in more detail than ever before.<\/p>\n
<\/p>\n The way the radio waves from Cassini\u2019s radar instrument bounced off Titan\u2019s surface indicate that the surface isn\u2019t as simple as those of most other rocky bodies in the solar system. \u201cThe canonical models that we use to try to understand Titan\u2019s surface, which were developed for the moon and are used for the moon, Earth, Venus \u2013 they don\u2019t work directly on Titan,\u201d says Hayes. \u201cTitan is a different beast in terms of the radar-scattering properties of the surface.\u201d<\/p>\n Instead of a simple rocky surface, the radar data was a better fit to a two-layer model, with a blanket of soft, low-density material covering a harder terrain. The blanket layer, ranging from centimetres to a metre in thickness, is probably made up of organic molecules from Titan\u2019s hazy atmosphere, which researchers expect should float down to the surface like snow before getting compacted and solidified over time.<\/p>\n Titan\u2019s surface also experiences rain, wind and erosion, so it is important to understand how the blanket layer has built up slowly over time, shaped by these processes. \u201cBut this could give us a hint for how things work more broadly on Titan,\u201d says Hayes.<\/p>\n NASA\u2019s Dragonfly mission, which is expected to launch in 2028 and arrive on Titan in 2034, should be able to measure these layers and help us figure out exactly how they formed. It is crucial not only for our understanding of Titan itself, but also for the design of any future spacecraft that will follow Dragonfly to visit this strange moon and attempt landing there.<\/p>\n Embark on an extraordinary journey through the heart of the US\u2019s space and astronomy landmarks, designed for curious minds and lifelong learners.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<\/section>\n Topics:<\/p>\n<\/section><\/div>\n![\"New](\"https:\/\/images.newscientist.com\/wp-content\/uploads\/2025\/09\/05144907\/shutterstock_2601376011-scaled.jpg\")
\n <\/picture>\nThe history and future of space exploration: US<\/h3>\n