In Depth | Our Solar System – NASA Solar System Exploration
Most of the hundreds of billions of stars in our galaxy are thought to have planets of their own, and the Milky Way is but one of perhaps 100 billion galaxies in the universe.
In Depth | Sun – NASA Solar System Exploration
The Sun orbits the center of the Milky Way, bringing with it the planets, asteroids, comets, and other objects in our solar system. Our solar system is moving with an average velocity of …
Our Sun is one of over 100 billion stars in the Milky Way, and our galaxy is just one of countless billions in the universe, each having millions – or billions – of stars of their own.
Science Overview Voyage is a 1 to 10-billion scale model of the Solar System that was permanently installed in Washington, D.C., in October 2001. The real Solar System is exactly …
About the Planets - NASA Solar System Exploration
May 28, 2025 · Our solar system has eight planets, and five dwarf planets - all located in an outer spiral arm of the Milky Way galaxy called the Orion Arm.
Solar System Exploration
Dec 4, 2025 · 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 …
The objectives of the Chinese Lunar Exploration Program that launched the Chang’e missions is to help pave the way for future human exploration missions. For more information, visit …
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.
In Depth | Lysithea – NASA Solar System Exploration
In one account, Zeus promised to do whatever Lysithea asked after he impregnated her, and Hera (Zeus' wife and sister) tricked her into asking for Zeus to come to her in the same way he …
In Depth | Kuiper Belt – NASA Solar System Exploration
The Kuiper Belt is a large region in the cold, outer reaches of our solar system beyond the orbit of Neptune. It's sometimes called the "third zone" of the solar system. Astronomers think there …