jupiter xv (10. 866)

Imaged for the first time on this day in 1979 by the Voyager 2 probe, the smallest inner moon of Jupiter responsible for maintaining the integrity of its rings, composed primarily scientists believe of ejecta from meteorite impacts on the satellite, Adrastea was the first object discovered by a spacecraft rather than observations from a terrestrial telescope. In response to this discovery, researchers reviewed footage from months earlier taken by companion probe Voyager I and found two additional moons, Thebe and Metis. The object, which little is known about other than its lumpy shape and small size (around fourteen meters in circumference), is named, like others in this planetary constellation, after Zeus’ mythological foster family, charged with protecting him from Cronus, after a Cretan nymph of Mount Ida whose name means ‘inevitable fate’ later identified with the epithet Nemesis.