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  • Pluto Dwarf Planets - Science@NASA
    Our solar system has five dwarf planets: In order of distance from the Sun they are: Ceres, Pluto, Haumea, Makemake, and Eris
  • About the Planets - Science@NASA
    About the Planets Our solar system has eight planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune There are five officially recognized dwarf planets in our solar system: Ceres, Pluto, Haumea, Makemake, and Eris
  • Pluto - Science@NASA
    Pluto is a dwarf planet located in a distant region of our solar system beyond Neptune known as the Kuiper Belt Pluto was long considered our ninth planet, but the International Astronomical Union reclassified Pluto as a dwarf planet in 2006 NASA's New Horizons was the first spacecraft to explore Pluto up close, flying by in 2015
  • Eris - Science@NASA
    Dwarf planet Eris is a member of a group of objects that orbit in a disc-like zone beyond the orbit of Neptune called the Kuiper Belt This distant realm is populated with thousands of miniature icy worlds, which formed early in the history of our solar system about 4 5 billion years ago
  • Planet Sizes and Locations in Our Solar System - Science@NASA
    Our solar system has eight planets, and five officially recognized dwarf planets Which planet is biggest? Which is smallest? What is the order of the planets as we move out from the Sun? This is a simple guide to the sizes of planets based on the equatorial diameter – or width – at the equator of each planet Each planet’s width is compared to Earth’s equatorial diameter, which is
  • Solar System Exploration - Science@NASA
    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
  • Pluto: Facts - NASA Science
    Pluto is a complex and mysterious world with mountains, valleys, plains, craters, and glaciers It is located in the distant Kuiper Belt Discovered in 1930, Pluto was long considered our solar system's ninth planet But after the discovery of similar worlds deeper in the Kuiper Belt, Pluto was reclassified as a dwarf planet in 2006 by the International Astronomical Union According to the
  • Solar System Facts - NASA Science
    Our solar system includes the Sun, eight planets, five dwarf planets, and hundreds of moons, asteroids, and comets
  • Haumea Facts - Science@NASA
    Haumea is an oval-shaped dwarf planet that is one of the fastest rotating large objects in our solar system The fast spin distorts Haumea's shape, making this dwarf planet look like a football Namesake Two teams claim credit for discovering Haumea citing evidence from observations made in 2003 and 2004
  • What is a Planet? - Science@NASA
    The New Definition of Planet Here is the text of the IAU’s Resolution B5: Definition of a Planet in the Solar System: "Contemporary observations are changing our understanding of planetary systems, and it is important that our nomenclature for objects reflect our current understanding This applies, in particular, to the designation 'planets '





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