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  2. Dwarf planets - National Air and Space Museum

    airandspace.si.edu/explore/topics/astronomy/dwarf-planets

    However, the IAU also adopted a new term: "dwarf planet." A dwarf planet is a planet that orbits the sun, has enough mass for its gravity to form it into a nearly round shape, has not cleared other large objects from the region it crosses during its orbit, and is not a satellite of another object in space. Pluto fits this definition perfectly.

  3. Our Solar System | National Air and Space Museum

    airandspace.si.edu/explore/stories/our-solar-system

    Now There Are Dwarf Planets, Too! The IAU Prague General Assembly also approved a new term, dwarf planet. A “dwarf planet” is a celestial body that. is in orbit around the Sun, has enough mass for its gravity to make the object have a (nearly) round shape, has not cleared other large objects from the region it crosses during its orbit.

  4. Pluto | National Air and Space Museum

    airandspace.si.edu/explore/stories/pluto

    A Dwarf Planet The IAU Prague General Assembly also approved a new term, dwarf planet. A “dwarf planet” is a celestial body that: (a) is in orbit around the Sun, (b) has enough mass for its gravity to make the object have a (nearly) round shape, (c) has not cleared other large objects from the region it crosses during its orbit. (Its ...

  5. Small solar system bodies | National Air and Space Museum

    airandspace.si.edu/explore/topics/astronomy/small-solar-system-bodies

    Small solar system bodies—along with the Sun, planets, and dwarf planets—help make up our Solar System. Small solar system bodies include things like comets, asteroids, moons, and the icy objects in the Kuiper Belt and the Oort cl

  6. Exoplanets - National Air and Space Museum

    airandspace.si.edu/explore/topics/astronomy/exoplanets

    Many are familiar with the planets inside our Solar System, but what about planets that exist outside it? These celestial bodies are known as exoplanets, and scientists learn more about them ever

  7. Solar System - National Air and Space Museum

    www.airandspace.si.edu/explore/topics/astronomy/solar-system

    The Solar System, located in the Milky Way Galaxy, is our celestial neighborhood. Our Solar System consists of 8 planets, several dwarf planets, dozens of moons, and millions of asteroids, comets, and meteoroids. They are all bound by gravity to the Sun, which is the star at the center of the Solar System.

  8. Uncrewed spaceflight - National Air and Space Museum

    airandspace.si.edu/explore/topics/spaceflight/uncrewed-spaceflight

    Flights of Fancy Story Time: "Family of the Sun" Family of the Sun, which tells the story of the planets in our solar system.

  9. How Did We Discover the Planets? - National Air and Space Museum

    airandspace.si.edu/stories/editorial/how-did-we-discover-planets

    In 1930, one of Lowell’s successors used that same instrument to finally find the planet, which would later be named Pluto. While Clyde Tombaugh was the person who eventually found Pluto, Lowell is credited with initiating the search. Today we define Pluto as a dwarf planet rather than a planet like Earth or Jupiter. What of the Moon?

  10. Dwarf Planets | National Air and Space Museum

    airandspace.si.edu/.../smithsonian-planetary-image-facility/dwarf-planets

    The Center for Earth and Planetary Studies (CEPS) at the Smithsonian National Air and Space Museum houses a Planetary Image Facility that contains hardcopy images ranging from the Ranger missions in the early 60s through Mars Curiosity mission. The purpose of the image facility is to act as a reference library providing planetary science researchers with access to the extensive collection of ...

  11. What an Accidental Discovery Told Us About Pluto

    airandspace.si.edu/stories/editorial/what-accidental-discovery-told-us-about-pluto

    June of this year marks the 40th anniversary of the discovery of Pluto’s largest moon, Charon. At the time of Charon’s discovery, scientists weren’t even looking for it.