Jupiter - NASA Solar System Exploration
4 days ago · 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 …
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 …
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.
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 …
In Depth | Amalthea – NASA Solar System Exploration
This may be because, as it orbits within Jupiter's powerful magnetic field, electric currents are included in the moon's core. Alternatively, the heat could be from tidal stresses.
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 …
In Depth | Earth's Moon – NASA Solar System Exploration
The temperature on the Moon reaches about 260 degrees Fahrenheit (127 degrees Celsius) when in full Sun, but in darkness, the temperatures plummet to about -280 degrees Fahrenheit …
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 …
Callisto - NASA Solar System Exploration
Jun 26, 2019 · Galileo spotted what he thought were bright stars near Jupiter, but eventually figured out that the “stars” were moons orbiting Jupiter. The German astronomer Simon …
Galleries | Callisto – NASA Solar System Exploration
Oct 21, 2025 · This composite image includes Jupiter with its Great Red Spot. and from top to bottom: Io, Europa, Ganymede, and Callisto.