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 | Oberon – NASA Solar System Exploration
Oberon is heavily cratered―similar to Umbriel―especially when compared to three other moons of Uranus: Ariel, Titania and Miranda. Like all of Uranus' large moons, Oberon is composed of roughly …
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; …
In Depth | Uranus Moons – NASA Solar System Exploration
Cordelia and Ophelia are shepherd moons that keep Uranus' thin, outermost "epsilon" ring well defined. Between them and Miranda is a swarm of eight small satellites unlike any other system of planetary …
In Depth | Triton – NASA Solar System Exploration
NASA's Voyager 2―the only spacecraft to fly past Neptune and Triton―found surface temperatures of -391degrees Fahrenheit (-235 degrees Celsius). During its 1989 flyby, Voyager 2 also found Triton …
In Depth | Ganymede – NASA Solar System Exploration
Ganymede is much colder than Earth, with daytime surface temperatures ranging from -297 to -171 degrees Fahrenheit (90 to 160 Kelvin). Jupiter and its moons receive less than 1/30th the amount of …
In Depth | Enceladus – NASA Solar System Exploration
Oct 9, 2008 · Because Enceladus reflects so much sunlight, the surface temperature is extremely cold, about minus 330 degrees Fahrenheit (minus 201 degrees Celsius). But it is not as cold and inactive …
In Depth | Kuiper Belt – NASA Solar System Exploration
The amount of material in the Kuiper Belt today might be just a small fraction of what was originally there. According to one well-supported theory, the shifting orbits of the four giant planets (Jupiter, …
About the Planets - NASA Solar System Exploration
May 28, 2025 · Our solar system has eight planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. There are five officially recognized dwarf planets in our solar system: Ceres, …
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 (-173 degrees …