In which year was the moon, on which the volcanic feature Reiden Patera is located, discovered ?
Io (moon) Io (Jupiter I) is the innermost of the four Galilean moons of the planet Jupiter. It is the fourth-largest moon, has the highest density of all the moons, and has the least amount of water of any known astronomical object in the Solar System. It was discovered in 1610 and was named after the mythological character Io, a priestess of Hera who became one of Zeus's lovers.
Mount Wilhelm Christophersen Mount Wilhelm Christophersen ( ) is a mound-shaped, ice-covered landform which rises from the edge of the polar plateau 6 km south of Antarctica's Mount Engelstad. The mound also overlooks the south side of the head of Axel Heiberg Glacier. It was discovered in 1911 by the Norwegian explorer Roald Amundsen and named by him for Wilhelm Christopher Christophersen, the Norwegian diplomat and Minister in Buenos Aires at that time.