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Earth is the third planet from the Sun and the only one with life. It has a global ocean, a dynamic atmosphere, a liquid core, and a varied surface with mountains, volcanoes, and landmasses.
Learn about the Sun and the objects that orbit it, including the eight planets, the nine dwarf planets, and the small bodies such as asteroids, comets, and moons. Explore the formation, evolution, and features of the Solar System and its place in the Milky Way galaxy.
A planet is a large, rounded astronomical body that is neither a star nor its remnant. The nebular hypothesis is the best available theory of planet formation. See lists of planets in the Solar System and beyond, by discovery method, distribution, characteristics and more.
Neptune is the eighth and farthest planet from the Sun, with a mostly hydrogen and helium atmosphere and 16 known moons. Its atmosphere is similar to Uranus's, with a dark blue colour and high winds, and has a cold temperature of about 72 K at one bar pressure.
Jupiter is a giant planet composed mostly of hydrogen and helium, with trace amounts of methane, ammonia, and water. Its atmosphere is composed of hydrogen, helium, methane, ammonia, and water vapor, and has a thick cloud deck and a powerful magnetic field.
Learn about the formation, evolution and development of Earth, the third planet from the Sun, from 4.54 billion years ago to the present day. Explore the geological, biological and climatic changes that shaped the planet and its life forms across four eons and many eras.
Region of sparsely scattered icy objects surrounding the Kuiper belt. Encompasses the dwarf planet Eris. Cited distance is derived by doubling the aphelion of Eris, the farthest known scattered disc object. As of now, Eris's aphelion marks the farthest known point in the scattered disc. [26] Oort cloud: 100,000–200,000 AU 0.613–1.23 pc [a]
A comprehensive overview of the planet Earth, its features, spheres, history, and future. Learn about Earth's location, movement, classification, natural environment, and more from this outline guide.