Planet Compare - NASA Solar System Exploration
Apr 9, 2026 · 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 | Our Solar System – NASA Solar System Exploration
The planetary system we call home is located in an outer spiral arm of the Milky Way galaxy. Our solar system consists of our star, the Sun, and everything bound to it by gravity – the planets Mercury, …
In Depth | Moons – NASA Solar System Exploration
In the outer solar system, the gas giants Jupiter and Saturn and the ice giants Uranus and Neptune have dozens of moons. As these planets grew in the early solar system, they were able to capture smaller …
RPS 3D Viewer - NASA Solar System Exploration
Apr 9, 2026 · 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 | Kuiper Belt – NASA Solar System Exploration
The basic idea is that early in the solar system's history, Uranus and Neptune were forced to orbit farther from the Sun due to shifts in the orbits of Jupiter and Saturn. As Uranus and Neptune drifted farther …
In Depth | Saturn Moons – NASA Solar System Exploration
The Voyager and Pioneer flybys of the 1970s and 1980s provided rough sketches of Saturn’s moons. But during its many years in Saturn orbit, NASA’s Cassini spacecraft discovered previously unknown …
Raw Images – NASA Solar System Exploration
Sep 21, 2023 · This gallery contains the full record of the Cassini spacecraft’s raw images taken from Feb. 20, 2004 to Cassini’s end of mission on Sept. 15, 2017. The archive will remain available to all …
In Depth | Enceladus – NASA Solar System Exploration
Oct 9, 2008 · Also, like some other moons in the extensive systems of the giant planets, Enceladus is trapped in what’s called an orbital resonance, which is when two or more moons line up with their …
Mars By the Numbers - NASA Solar System Exploration
Apr 9, 2026 · Mars is the fourth planet from the Sun, and the seventh largest. It’s the only planet we know of inhabited entirely by robots.
In Depth | Ganymede – NASA Solar System Exploration
The discovery eventually led to the understanding that planets in our solar system orbit the Sun, instead of our solar system revolving around Earth. (Jupiter now has 53 named moons and 26 provisional …