Saturns moon Titan sports phantom hydrocarbon lakes
Three lakes on Saturns moon Titan have up and vanished.
Researchers previously had seen evidence that Titans lakes, filled with hydrocarbons like methane and ethane, shrink during the moons summer. But a new analysis of data from the defunct Cassini spacecraft offers the first glimpse of lakes completely disappearing off the face of the moon. The discovery of these phantom lakes offers new insight into the only other solar system body known to host a hydrological cycle, researchers report online April 15 in Nature Astronomy.
Planetary scientist Shannon MacKenzie and colleagues uncovered the disappearing lakes by comparing Cassini observations from two different seasons of Titans year, which lasts 29.5 Earth years. In the midst of Titans winter in 2006, Cassinis radar observations indicated that all three lakes were filled with liquid. But when Cassinis infrared cameras were trained on the lakes in 2013, during the moons spring, all three had dried up.
“The fact that they just do not look like liquids at all to the [infrared] instruments is so weird,” says MacKenzie, of Johns Hopkins University Applied Physics Laboratory in Laurel, Md. These lakes may have been extremely shallow, perhaps just centimeters deep, and evaporated or seeped into the ground as winter turned to spring.
Not all of Titans lakes are so fragile. Planetary scientist Marco Mastrogiuseppe of Caltech and colleagues examined Cassini radar data from 2017 and found that some of the moons other lakes may be mRead More – Source