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  • 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, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune; dwarf planets such as Pluto; dozens of moons; and millions of asteroids, comets, and
  • Planet Compare - NASA Solar System Exploration
    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 | 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 objects with their large gravitational fields
  • About the Planets - NASA Solar System Exploration
    The giant planets in the outer solar system don't have hard surfaces Instead, they have swirling gases above a core Jupiter and Saturn are gas giants Uranus and Neptune are ice giants
  • Solar System Exploration
    The solar system has one star, eight planets, five dwarf planets, at least 290 moons, more than 1 3 million asteroids, and about 3,900 comets
  • Kuiper Belt and Oort Cloud - NASA Solar System Exploration
    It never enters the Kuiper Belt, whose outer boundary 2005 — Astronomers announce the discovery of 2003UB313 region lies at about 55 AU — instead, Sedna travels in a long, elliptical orbit between 76 and nearly 1,000 AU from the Sun
  • RPS 3D Viewer - NASA Solar System Exploration
    NASA’s real-time science encyclopedia of deep space exploration Our scientists and far-ranging robots explore the wild frontiers of our solar system
  • Technologies for Outer Planet Missions: A Companion to the Outer Planet . . .
    This is the final version of a white paper which provides the OPAG recommendations for technology required to undertake outer planetary missions The paper describes the need for an OP technology program and provides specific recommendations for NASA investments during the next decade
  • In Depth | Kuiper Belt – NASA Solar System Exploration
    The Kuiper Belt is a large region in the cold, outer reaches of our solar system beyond the orbit of Neptune It's sometimes called the "third zone" of the solar system Astronomers think there are millions of small, icy objects in this region – including hundreds of thousands that are larger than 60 miles (100 kilometers) wide
  • In Depth | Triton – NASA Solar System Exploration
    Triton is the largest of Neptune's 13 moons It is unusual because it is the only large moon in our solar system that orbits in the opposite direction of its planet's rotation―a retrograde orbit Scientists think Triton is a Kuiper Belt Object captured by Neptune's gravity millions of years ago





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