Io: A Volcanic Puzzle – NASA Solar System Exploration
1995年11月9日 · Since Jupiter is mainly liquid and gas, the warm interior can move upwards towards the surface without volcanic activity. On 7 December 1995, Galileo will have its one and only opportunity for a close encounter with Jupiter's moon Io, the most volcanically active body in the solar system.
Io Observer – NASA Solar System Exploration
2024年10月1日 · The Jovian moon Io is likely the most geologically active body in the solar system, offering insight into tidal heating, volcanic processes, and other phenomena. However, its location within Jupiter''s radiation belt presents significant engineering challenges that must be addressed to enable future missions to Io.
Io By the Numbers – NASA Solar System Exploration
2024年10月1日 · The outer or uppermost part of a planet, moon, asteroid, comet or other body. The gravitational acceleration experienced at its surface at the equator. The speed needed for an object to break away from the gravitational pull of a planet or moon. The numbers displayed here are approximations.
In Depth | Europa – NASA Solar System Exploration
Jupiter’s moons Io, Europa, and Ganymede are in what is called a resonance – every time Ganymede orbits Jupiter once, Europa orbits twice, and Io orbits four times.
In Depth | Moons – NASA Solar System Exploration
Jupiter's menagerie of moons includes the largest in the solar system (Ganymede), an ocean moon (Europa) and a volcanic moon (Io). Many of Jupiter's outer moons have highly elliptical orbits and orbit backwards (opposite to the spin of the planet).
10 Need-to-Know Things About Io - NASA Solar System Exploration
The moon Io is the most volcanically active world in the solar system. Io even has lakes of molten silicate lava on its surface.
Io 3D Model - NASA Solar System Exploration
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Callisto - NASA Solar System Exploration
2019年6月26日 · Callisto. Introduction. Callisto and Jupiter’s three other largest moons were discovered in 1610 by Italian scientist Galileo Galilei. Almost 400 years later , a spacecraft bearing his name —the Galileo orbiter—began the first in depth study of the Jovian system, including Callisto and its sister moons. Galileo orbited Jupiter until the ...
In Depth | Titan – NASA Solar System Exploration
Saturn's largest moon, Titan, is an icy world whose surface is completely obscured by a golden hazy atmosphere. Titan is the second largest moon in our solar system. Only Jupiter's moon Ganymede is larger, by just 2 percent. Titan is bigger than Earth's moon, and larger than even the planet Mercury.
In Depth | Triton – NASA Solar System Exploration
Triton is the largest of Neptune's 13 moons. It is unusual because it is the only large moon in our solar system that orbits in the opposite direction of its planet's rotation―a retrograde orbit. Scientists think Triton is a Kuiper Belt Object captured by Neptune's gravity millions of years ago.