Dave5

These bright and unusually smooth spots dotting the moon’s liquid methane and ethane oceans first showed up in observations by NASA’s Cassini-Huygens spacecraft in 2013. At the time, astronomers were puzzled by the islands’ unnerving ability to appear and disappear from observations over time, a quality that earned its enchanting nickname. Ever since, scientists have been trying to explain the mysterious phenomenon.

https://futurism.com/the-byte/titan-magic-islands