Universe & space

Discovery of Cyllene

9 February 2003

Cyllene is a small irregular moon of Jupiter, around two kilometres across, belonging to the Pasiphae group of retrograde moons. Its distant orbit runs in the opposite direction to Jupiter's rotation, and the moons in this group are thought to be pieces of a body captured and broken apart by a collision. It was discovered in a search for faint outer moons of Jupiter by astronomers at the University of Hawaii. Its name is taken from Greek mythology, and as a retrograde moon it ends in the letter e.

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