Io (/ˈaɪ.oʊ/), or Jupiter I, is the innermost and second-smallest of the four Galilean moons of the planet Jupiter. Slightly larger than Earth's moon...

Look up -io, IO, Io, or io in Wiktionary, the free dictionary. Io most commonly refers to: Io (moon), a moon of Jupiter Io (mythology), daughter of Inachus...

The Galilean moons (/ˌɡælɪˈleɪ.ən/), or Galilean satellites, are the four largest moons of Jupiter: Io, Europa, Ganymede, and Callisto. They are the most...

The exploration of Io, Jupiter's innermost Galilean and third-largest moon, began with its discovery in 1610 and continues today with Earth-based observations...

The atmosphere of Io is the extremely thin blanket of gases surrounding Jupiter's third largest moon Io. The atmosphere is primarily composed of sulfur...

Volcanism on Io, a moon of Jupiter, is represented by the presence of volcanoes, volcanic pits and lava flows on the surface. Io's volcanic activity was...

Danaus. The astronomer Simon Marius named a moon of Jupiter after Io in 1614. Because her brother was Phoroneus, Io is also known as Phoronis (an adjective...

Tidal heating of Io (also known as tidal working) occurs through the tidal friction processes between Jupiter and its moon. Orbital and rotational energy...

Patera /ˈloʊki ˈpætərə/ is the largest volcanic depression on Jupiter's moon Io, 202 kilometres (126 mi) in diameter. It contains an active lava lake,...

South Boösaule Mons (/ˌboʊ.ɒˈsɔːliː/), the highest mountain of Jupiter's moon Io, is one of the tallest mountains in the Solar System. It is located just...