New Study Challenges Existence of Subsurface Ocean on Saturn's Moon Titan
Recent research suggests Titan's interior may consist of slushy ice layers with pockets of liquid water, rather than a global subsurface ocean.
A recent study challenges the long-held belief that Saturn's moon Titan harbors a vast underground ocean. Researchers from NASA's Jet Propulsion Laboratory and the University of Washington analyzed data from NASA's Cassini mission and found evidence suggesting Titan's interior comprises thick layers of slushy ice interspersed with pockets of liquid water, rather than a global subsurface ocean.
The team observed a time delay between Saturn's gravitational pull and Titan's surface response, indicating strong energy dissipation within the moon. This finding contradicts the existence of a vast underground ocean. Their models suggest that slush and water may extend over 340 miles beneath a 100-mile-thick icy crust, with temperatures potentially reaching 68°F (20°C), raising the possibility of microscopic life.
While the notion of an ocean on Titan invigorated the search for life there, the researchers believe the new findings might improve the odds of finding it. Analyses indicate that the pockets of freshwater on Titan could reach 68 degrees Fahrenheit. Any available nutrients would be more concentrated in a small volume of water, compared to an open ocean, which could facilitate the growth of simple organisms.
Future data from NASA's Dragonfly mission, set to launch later this decade, is expected to clarify Titan's internal structure. Titan remains of great interest as a possible "ocean world" alongside other suspected candidates like Jupiter's Ganymede and Europa and Saturn's Enceladus.