Solar System Exploration - NASA Science
网页The solar system has one star, eight planets, five officially named dwarf planets, hundreds of moons, thousands of comets, and more than a million asteroids. Our solar system is located in the Milky Way, a barred spiral …
Solar System - Wikipedia
网页The Sun is a typical star that maintains a balanced equilibrium by the fusion of hydrogen into helium at its core, releasing this energy from its outer photosphere. Astronomers classify it as a G-type main-sequence star. The largest objects that orbit the Sun are the eight planets.
Solar System Facts - Science@NASA
网页The solar system includes the Sun, eight planets, five officially named dwarf planets, and hundreds of moons, and thousands of asteroids and comets. Our solar system is located in the Orion Spur of the Milky Way, a barred spiral …
3D Solar System Viewer | TheSkyLive.com
网页Visualize orbits, relative positions and movements of the Solar System objects in an interactive 3D Solar System viewer and simulator.
Our Solar System - NASA Science
网页2016年3月15日 · Our solar system is made up of a star—the Sun—eight planets, 146 moons, a bunch of comets, asteroids and space rocks, ice, and several dwarf planets, such as Pluto. The eight planets are Mercury, Venus, Earth, …
In Depth | Our Solar System – NASA Solar System Exploration
网页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. Beyond our own solar system, there are more planets than stars in the night sky.
Solar system | Definition, Planets, Diagram, Videos, & Facts
网页4 天之前 · solar system, assemblage consisting of the Sun—an average star in the Milky Way Galaxy—and those bodies orbiting around it: 8 (formerly 9) planets with more than 210 known planetary satellites (moons); many asteroids, some with their own satellites; comets and other icy bodies; and vast reaches of highly tenuous gas and dust known as the ...
In Depth | Sun – NASA Solar System Exploration
网页The Sun is a 4.5 billion-year-old yellow dwarf star – a hot glowing ball of hydrogen and helium – at the center of our solar system. It’s about 93 million miles (150 million kilometers) from Earth and it’s our solar system’s only star. Without the Sun’s energy, life as we know it could not exist on our home planet.
Gallery of NASA Solar System Images - NASA Space Place
网页2021年3月11日 · Gallery of NASA Solar System Images. Our solar system is made up of a star—the Sun—eight planets, more than 140 moons, a bunch of comets, asteroids and space rocks, ice, and several dwarf planets, such as Pluto.
Celestial sphere: The apparent motions of the Sun, Moon, planets, and stars
网页The celestial sphere is an imaginary projection of the Sun, Moon, planets, stars, and all astronomical bodies upon an imaginary sphere surrounding Earth. Although originally developed as part of the ancient Greek concept of an Earth-centered (geocentric) universe, the hypothetical celestial sphere gives astronomers an important tool for fixing ...