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  1. Dwarf planets - National Air and Space Museum

    Jun 9, 2020 · 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 …

  2. Solar System - National Air and Space Museum

    Aug 7, 2025 · 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 …

  3. Dwarf Planets - National Air and Space Museum

    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 …

  4. Our Solar System - National Air and Space Museum

    Our solar system has four giant planets: Neptune, Uranus, Saturn, and Jupiter. Giant planets are much larger than Earth—they are unimaginably huge, stunningly beautiful, and sometimes a …

  5. The Planets in Our Solar System – A Timeline - National Air and …

    Oct 8, 2024 · Okay, we can. But we are not going to talk other dwarf planets—there are so many! Ceres, Makemake, Quaoar, and Sedna are some of the larger dwarf planets, just to name a …

  6. Small solar system bodies - National Air and Space Museum

    May 22, 2024 · 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, …

  7. Exoplanets - National Air and Space Museum

    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 …

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

    Aug 1, 2023 · When you look up you can see the stars, the Moon, and sometimes even other planets! We know what these otherworldly objects are because of centuries of research …

  9. Can Two Planets Orbit Each Other? - National Air and Space …

    Sep 29, 2025 · Planets orbit the Sun, and moons orbit planets and other small planetary bodies, but can two planets orbit each other? The short answer to this question is yes, two planets …

  10. What Makes a Moon a Moon? | National Air and Space Museum

    Nov 14, 2024 · What Makes a Moon a Moon? A moon is a planetary body that goes around another planetary body. Usually, this is one or more moons going around a planet, but it …