A news release from the Cornell University reported radar images from NASA's Cassini mission, which revealed a geological object that was not there earlier in Ligeia Mare, Titan's second-largest ocean.

Titan is the largest moon out of the 62 moons of Saturn and it geologically resembles the Earth. It has a nitrogen-methane atmosphere, vast oceans and tall mountains. Instead of water, the oceans and rivers have liquid methane and ethane.

The researchers followed a study method called "flipping" in which the team flipped between old and new images of Titan in a hope of detecting some sign of change.

The last flyby of Titan which was done on May 17 was definitely one of the most scientifically valuable encounters of the extended mission of the spacecraft. The focus of that flyby, called "T-101," was to use radio signals to explore the physical nature of the vast northern seas of Titan and also probe the high regions of its atmosphere.

The Cassini team also hopes to get the technical success of that flyby during the T-102 encounter, which is slated for June 18. The spacecraft will attempt similar measurements of Titan during this too. At the closest approach, the spacecraft will be just 3,659 kilometres above the surface of the moon while travelling at a speed of 5.6 kilometres per second.

During the flyby, if all goes well like it did before, Cassini's radio science subsystem will bounce signals off the surface of Titan and towards the Earth. They will be received by the ground stations of Deep Space Network of NASA. This kind of observation is called a bi-static scattering experiment and its results can give clues to answer a number of questions about large areas of Titan's surface.

A second technical accomplishment which is an experiment to send precision-tuned radio frequencies through Titan's atmosphere makes the May and June flybys special.