Planet Compare - NASA Solar System Exploration
Oct 21, 2025 · NASA’s real-time science encyclopedia of deep space exploration. Our scientists and far-ranging robots explore the wild frontiers of our solar system.
Jupiter - NASA Solar System Exploration
Jan 13, 2026 · Facts About Jupiter Jupiter is the largest and oldest planet in our solar system. If Jupiter was a hollow shell, 1,000 Earths could fit inside. But the "King of Planets" is no lumbering giant — …
In Depth | Ganymede – NASA Solar System Exploration
Jupiter’s moon Ganymede is proving to be a fascinating world. Not only is it the largest moon in our solar system, bigger than the planet Mercury and the dwarf planet Pluto, but NASA’s Hubble Space …
In Depth | Europa – NASA Solar System Exploration
The reduced density at greater distances is likely due to temperature: denser, rocky, and metal material condenses out first, close to Jupiter or the Sun, while lighter-weight icy material only condenses out …
In Depth | Io – NASA Solar System Exploration
As Jupiter rotates, it takes its magnetic field around with it, sweeping past Io and stripping off about 1 ton (1,000 kilograms) of Io's material every second. This material becomes ionized in the magnetic field …
The Kuiper Belt should not be confused with the Oort Cloud, which is a thousand times more distant. In 1950, astronomer Jan Oort proposed that certain comets come from a vast, extremely distant …
In Depth | Titan – NASA Solar System Exploration
The surface of Titan is one of the most Earthlike places in the solar system, albeit at vastly colder temperatures and with different chemistry. Here it is so cold (-290 degrees Fahrenheit or -179 …
Europa By the Numbers – NASA Solar System Exploration
May 16, 2024 · Europa is one of the largest of Jupiter’s more than 90 moons. It's the sixth-closest moon to the planet.
In Depth | Our Solar System – NASA Solar System Exploration
Our solar system consists of our star, the Sun, and everything bound to it by gravity – the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune; dwarf planets such as Pluto; …
Jupiter 3D Model – NASA Solar System Exploration
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