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  1. nasa.gov
    https://solarsystem.nasa.gov › pluto-by-the-numbers

    Pluto By the Numbers - NASA Solar System Exploration

    Oct 21, 2025 · Pluto was once our solar system's ninth planet, but has been reclassified as a dwarf planet. It's located in the Kuiper Belt.

  2. nasa.gov
    https://solarsystem.nasa.gov › solar-system › our-solar-system › in-depth.amp

    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; …

  3. nasa.gov
    https://solarsystem.nasa.gov › solar-system › kuiper-belt › in-depth.amp

    In Depth | Kuiper Belt – NASA Solar System Exploration

    Pluto's Place in the Kuiper Belt In 1930, Pluto became the first Kuiper Belt object to be discovered. It was found at a time before astronomers had reason to expect a large population of icy worlds …

  4. nasa.gov
    https://solarsystem.nasa.gov › internal_resources
    [PDF]

    Kuiper Belt and Oort Cloud - NASA Solar System Exploration

    In March 2004, a team of astronomers announced the discovery of a planet-like transneptunian object orbiting the Sun at an extreme distance, in one of the coldest known regions of our solar system.

  5. nasa.gov
    https://solarsystem.nasa.gov › planet-compare

    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.

  6. nasa.gov
    https://solarsystem.nasa.gov › system › downloadable_items
    [PDF]

    Voyage: A Journey through our Solar System Grades 9-12 Lesson …

    Design a scale model Solar System for public display. Describe the characteristics of the Solar System that make construc-tion of a good scale model so dificult.

  7. nasa.gov
    https://solarsystem.nasa.gov › moons › jupiter-moons › ganymede › in-depth.a…

    In Depth | Ganymede – NASA Solar System Exploration

    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 …

  8. nasa.gov
    https://solarsystem.nasa.gov › gltf_embed

    Pluto 3D Model – NASA Solar System Exploration

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  9. nasa.gov
    https://solarsystem.nasa.gov

    RPS 3D Viewer - NASA Solar System Exploration

    Oct 21, 2025 · NASA Solar System Exploration Our Galactic Neighborhood Solar System Planets Moons Asteroids, Comets & Meteors

  10. nasa.gov
    https://solarsystem.nasa.gov › moons › in-depth.amp

    In Depth | Moons – NASA Solar System Exploration

    Pluto's large moon Charon is about half the size of Pluto. Like Earth's Moon, Charon may have formed from debris resulting from an early collision of an impactor with Pluto.