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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 meteoroids Beyond our own solar system, there
  • 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
  • Pluto By the Numbers - NASA Solar System Exploration
    Pluto was once our solar system's ninth planet, but has been reclassified as a dwarf planet It's located in the Kuiper Belt
  • 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 Some of the objects, including Pluto, are over 600 miles (1,000
  • 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
  • Voyage: A Solar - NASA Solar System Exploration
    Lesson Overview It is challenging to design a scale model of the Solar System where the same scale is used to portray not only the physical sizes of the Sun and planets, but also the distances between them Planets are tiny worlds in a vast space In October 2001, the Voyage Scale Model Solar System opened in Washington, DC, displaying a one to ten billion scale of the sizes of the Sun and
  • 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 Hubble Space Telescope has found the best evidence yet for an underground saltwater ocean on Ganymede The ocean is thought to have more water than all the water on Earth's surface Ganymede’s ocean is
  • Pluto 3D Model – NASA Solar System Exploration
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  • In Depth | Moons – NASA Solar System Exploration
    Scientists using the Hubble Space Telescope to study Pluto found four more small moons Eris, another dwarf planet even more distant than Pluto, has a small moon of its own, named Dysnomia
  • Kuiper Belt and Oort Cloud - NASA Solar System Exploration
    Pluto, Eris, Haumea, and Makemake retain their classifi-cation as KBOs (or TNOs) While no spacecraft has yet traveled to the Kuiper Belt, NASA’s New Horizons spacecraft, which is scheduled to arrive at Pluto in 2015, plans to study other KBOs after the Pluto mission is complete





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