How big is Io Jupiter moon?

1,131.9 mi
Io/Radius

Is Io bigger than our moon?

A bit larger than Earth’s Moon, Io is the third largest of Jupiter’s moons, and the fifth one in distance from the planet.

What is the surface of Io moon?

The surface of Io is completely volcanic, with lava flows of sulfur from the interior, as shown in this image. White patches in the image are areas of frost made of sulfur dioxide instead of water. The heat for this volcanism comes from the special position of Io relative to Jupiter and the other moons.

What is Jupiter’s surface area?

The surface area of this enormous planet is 23,713,907,537 square miles, or 6.1419×1010 square kilometers, 120 times that of our planet. Jupiter’s structure resembles that of the sun, but would need to be 75 times its present mass to undergo the fusion of hydrogen that fuels a star.

How was Io discovered?

The Discovery of Io Io was the first of Jupiter’s moons discovered by Galileo Galilei on Jan. 8, 1610. Several spacecraft have flown by Jupiter and its moons. Pioneer 10 arrived first, in 1973, followed by Pioneer 11 in 1974.

What is the surface of Io?

Unlike most moons in the outer Solar System, which are mostly composed of water ice, Io is primarily composed of silicate rock surrounding a molten iron or iron sulfide core. Most of Io’s surface is composed of extensive plains with a frosty coating of sulfur and sulfur dioxide.

Why is Io yellow?

Sulfur dioxide frost is ubiquitous across the surface of Io, forming large regions covered in white or grey materials. Sulfur is also seen in many places across Io, forming yellow to yellow-green regions.

Is Io tidally locked to Jupiter?

Io by the numbers Its average orbital distance is about 262,000 miles (422,000 km). Io takes 1.77 Earth-days to orbit Jupiter. Io is tidally locked, so the same side always faces Jupiter.

How many Jupiters fit in the sun?

1,000 Jupiters
According to multiple studies, around 1,000 Jupiters could fit into the Sun.

How do we know Jupiter has no surface?

We do not yet know if a solid surface exists on Jupiter. Jupiter’s clouds are thought to be about 30 miles (50 km) thick. Below this there is a 13,000 mile (21,000 km) thick layer of hydrogen and helium which changes from gas to liquid as the depth and pressure increase.

Who Found Jupiter’s moon Io?

Galileo Galilei
Io/Discoverers
Jan 7, 1610 CE: Galileo Discovers Jupiter’s Moons. On January 7, 1610, Italian astronomer Galileo Galilei discovered, using a homemade telescope, four moons orbiting the planet Jupiter.

Is Io Jupiter’s largest moon?

Io (Jupiter I) is the innermost of the four Galilean moons of Jupiter; with a diameter of 3642 kilometers, it is the fourth-largest moon in the Solar System, and is only marginally larger than Earth’s moon. It was named after Io, a priestess of Hera who became one of the lovers of Zeus.