Linda A. Morabito (born November 21, 1953), also known as Linda Kelly, Linda Hyder, and Linda Morabito-Meyer, is the astronomer who made the discovery of volcanic activity on Io, a moon of Jupiter, on March 9, 1979, at NASA's Jet Propulsion Laboratory. At the time of her discovery, she was serving as Cognizant Engineer over the Optical Navigation Image Processing System (ONIPS) on the Voyager deep space mission Navigation Team. While performing image processing analysis of a Voyager 1 picture taken for spacecraft navigation, she detected a kilometre (mi) tall cloud off the limb of Io. The cloud was of volcanic origin. This was the first time in history that active volcanism was detected outside Earth. Her discovery is considered by some planetary scientists as the largest discovery of the