Three radar images from NASA's Cassini mission show a 20km object in Ligeia Mare, a lake on Saturn's moon Titan. Images from April 26, 2007, July 10, 2013, and August 21, 2014, reveal the object's appearance and evolution, sparking speculation about its origin (e.g., bubbling foam or floating solids). The mystery remains unresolved.

Astronomy Picture from 15/10/2014

Mysterious Changing feature on Titan

Source: https://apod.nasa.gov/apod/ap141015.html


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