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First discovery of extraterrestrial volcanism

First discovery of extraterrestrial volcanism
Who
Linda Morabito
What
First
Where
Not Applicable (,Io, Jupiter,)
When
1979
Shortly after Voyager 1’s encounter with Jupiter on 5 March 1979, navigation engineer Linda Morabito (USA) discovered an anomalous crescent protruding from the moon Io in a black and white image, while examining images to confirm the spacecraft’s trajectory. Initially looking like another moon behind Io, the crescent was soon confirmed to be above a part of Io that looked like a volcano. What Linda had discovered was the first active volcano on a world other than Earth.