Solar System - Wikipedia
The Solar System [d] is the gravitationally bound system of the Sun and the objects that orbit it. [11] It formed about 4.6 billion years ago when a dense region of a molecular cloud collapsed, forming the Sun and a protoplanetary disc.
Solar system | Definition, Planets, Diagram, Videos, & Facts
2 天之前 · Solar system, assemblage consisting of the Sun and those bodies orbiting it: 8 planets with about 210 known planetary satellites; many asteroids, some with their own satellites; comets and other icy bodies; and vast reaches of highly tenuous gas and dust known as the interplanetary medium.
Eyes on the Solar System - NASA/JPL - NASA's Eyes
Explore the 3D world of the Solar System. Learn about past and future missions.
The solar system—facts and information - National Geographic
2019年3月27日 · Our solar system is made up of the sun and all the amazing objects that travel around it. Learn more about the planets, asteroids, and comets in our solar system. Skip to content
In Depth | Our Solar System - NASA Solar System Exploration
Our solar system consists of our star, the Sun, and everything bound to it by gravity – the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune; dwarf planets such as Pluto; dozens of moons; and millions of asteroids, comets, and meteoroids.
Solar System Facts - Science@NASA
2025年1月17日 · 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 ...
Solar System | NASA Space Place – NASA Science for Kids
2025年1月14日 · Read this article to find out how long it takes all the planets in our solar system to make a trip around the Sun. Drive around the Red Planet and gather information in this fun coding game! What Is the Weather Like on Other Planets? Each of the planets in our solar system experiences its own unique weather. Is There Ice on Other Planets?
The solar system: Facts about our cosmic neighborhood
2022年2月25日 · Here's a look at our solar system, from the scorching surface of Venus to the home of the largest volcano. When you purchase through links on our site, we may earn an affiliate commission....
Solar System - Harvard–Smithsonian Center for Astrophysics
The Solar System provides the only known example of a habitable planet, the only star we can observe close-up, and the only worlds we can visit with space probes. Solar System research is essential for understanding the origin and evolution of planets, along with the conditions necessary for life.
Science 101: The Solar System - National Geographic Society
2024年12月3日 · Learn facts about the solar system's genesis, plus its planets, moons, and asteroids. How many planets are in the solar system? How did it form in the Milky Way galaxy?