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 …
In Depth | Kuiper Belt – NASA Solar System Exploration
As Uranus and Neptune drifted farther outward, they passed through the dense disk of small, icy bodies left over after the giant planets formed. Neptune's orbit was the farthest out, and its …
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
Sep 3, 2025 · Jupiter is the fifth planet from the Sun, and the largest in the solar system – more than twice as massive as the other planets combined.
RPS 3D Viewer - NASA Solar System Exploration
Oct 21, 2025 · Moons About Moons BY DESTINATION Earth (1) Mars (2) Jupiter (95) Saturn (83) Uranus (27) Neptune (14) Pluto (5) Asteroids, Comets & Meteors About Asteroids, Comets & …
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 …
Mars By the Numbers - NASA Solar System Exploration
Oct 21, 2025 · Mars is the fourth planet from the Sun, and the seventh largest. It’s the only planet we know of inhabited entirely by robots.
They are thought to come from the Kuiper Belt or from the so-called scattered disc, a dynamic zone created by the outward motion of Neptune that contains many icy objects with eccentric …
In Depth | Asteroids – NASA Solar System Exploration
There are Mars and Neptune trojans, and NASA announced the discovery of an Earth trojan in 2011. Near-Earth Asteroids: These objects have orbits that pass close by that of Earth.
In Depth | 1P/Halley – NASA Solar System Exploration
At aphelion in 1948, Halley was 35.25 AU (3.28 billion miles or 5.27 billion kilometers) from the Sun, well beyond the distance of Neptune. The comet was moving 0.91 kilometers per second …