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Amendment 75: Corrections to several program elements regarding SciENcv and other topics Embracing the Equinox NASA Discovery Reveals Complex Water Systems on Early Mars Helio and You: A Fresh Perspective on the Sun NASA-JAXA XRISM Mission Sees Pulsar Gathering Companion’s ‘Wind’ NASA’s Hubble Spots an Out-of-Sync Galaxy NASA-Funded Research Finds Complex Life Defying Record Heat Amendment 75: Corrections to several program elements regarding SciENcv and other topics Hydrosphere (ROSES A.17) Passion Meets Precision at NASA’s Flight Research Lab NASA Johnson Pilots Chase Moon’s Shadow for Eclipse Science NASA Selects University Teams to Help Advance Aviation Research Helio and You: A Fresh Perspective on the Sun NASA Celebrates Restoration of Guam Station Damaged by Typhoon Mawar NASA’s Life-Saving Technology Where Cell Signals Can’t Go NASA Astronaut to Answer Questions from New Hampshire Students NASA Kicks Off Nationwide Effort to Prepare Tomorrow’s Space Workforce NASA’s Integrated Medical Model (IMM) NASA Awards SpaceX Three Crew Flights to Space Station Passion Meets Precision at NASA’s Flight Research Lab NASA Welcomes Albania as Newest Artemis Accords Signatory La NASA anuncia la cobertura de la misión lunar Artemis II Agenda diaria de la misión a la Luna de Artemis II de la NASA La NASA refuerza Artemis: añade una misión y perfecciona su arquitectura general Join us as we explore our solar system. 10 THINGS about our solar system Our solar system has eight planets, and five dwarf planets. 2. Small Worlds, Too About 1.4 million asteroids, and about 4,000 comets are in our solar system. 3. Lots of Moons Our solar system has hundreds of moons. 4. Meet Me in the Milky Way Our solar system is in one of the Milky Way galaxy’s spiral arms called the Orion Spur. 5. A Long Way Around Our solar system takes about 230 million years to orbit the galactic center. 6. Spiraling Through Space The Milky Way is a barred spiral galaxy. 7. Diverse Atmospheres Our solar system has many worlds with many types of atmospheres. The four giant planets – and at least one asteroid – have rings. 9. Getting Out There More than 300 robotic spacecraft have left Earth's orbit, and 24 U.S. astronauts have traveled to the Moon. 10. Life as We Know It So far, Earth is the only place we've found life in our solar system. Solar System Facts Solar System Facts Our solar system includes the Sun, eight planets, five officially named dwarf planets, hundreds of moons, and thousands of asteroids and comets. Our solar system is located in the Milky Way, a barred spiral galaxy with two major arms, and two minor arms. Our Sun is in a small, partial arm of the Milky Way called the Orion Arm, or Orion Spur, between the Sagittarius and Perseus arms. Our solar system orbits the center of the galaxy at about 515,000 mph (828,000 kph). It takes about 230 million years to complete one orbit around the galactic center. About the Planets Learn about the inner planets, the outer planets, and the dwarf planets. Moons in Our Solar System Our solar system has hundreds of moons, and they come in a variety of shapes and sizes. Many moons orbit planets, and even some asteroids have moons. What’s Up: September 2026 Use the Moon to find Antares and the Teapot, spot brilliant Venus, welcome the equinox, and see the Harvest Moon near Saturn and Neptune. Solar System News Embracing the Equinox NASA Discovery Reveals Complex Water Systems on Early Mars NASA’s Moon Orbiter Spots New, ‘Once-in-Century’ Moon Crater NASA’s Integrated Medical Model (IMM) NASA Field-Tests AI Fleet Capability for Science, Exploration Eyes on the Solar System Featured Missions Europa Clipper launched Oct. 14, 2024, to conduct a detailed investigation of Jupiter's moon Europa. In August 2029, Psyche will arrive at a metal-rich asteroid with the same name. Lucy is on the first mission to explore the Jupiter Trojan asteroids. NEO Surveyor will hunt asteroids and comets that are potential hazards to Earth. Featured Articles 10 Things: Going Interstellar 10 Things: What's That Space Rock? 10 Things: Our Solar System’s Most Marvelous Moons 10 Things: Greatest Hits – Craters We Love Explore curated collections of resources, including activities that can be done at home, as well as videos, animations, handouts, and online interactives. Asteroids and Comets Discover More Topics Asteroids, Comets & Meteors