Saturn has a moon called Titan, and Titan has a sea that something weird appears to be happening in.
Astronomers have spotted a bright, mysterious object in the sea that was not there before.
Scientists were perplexed to find the feature had vanished when they looked again, over several months, with low-resolution radar and Cassini's infrared imager. This led some team members to suggest it might have been a transient feature. But during Cassini's flyby on August 21, 2014, the feature was again visible, and its appearance had changed during the 11 months since it was last seen.
They think it could be one of either "surface waves, rising bubbles, floating solids, solids suspended just below the surface".
Or, it could be something even weirder. But probably not an island, even though it kind of looks that way.