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.
North Complex North Complex is a feature on Earth's Moon, a group of hills in the Hadley–Apennine region. It was an intended destination for the astronauts of the Apollo 15 mission, but due to problems extracting a rock core near the landing site, there was not enough time to make the journey. The hills are thought to be volcanic in origin, but this remains unconfirmed because no samples were collected there.