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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.
An overview of the Solar System, its regions, celestial objects, structure, composition, history, exploration and lists. Learn about the Sun, planets, moons, dwarf ...
A comprehensive and updated list of the most massive and smallest objects in the Solar System, sorted by radius and mass. Includes planets, dwarf planets, moons, asteroids, comets, and trans-Neptunian objects, with graphs, notes, and references.
A planet is a large, rounded astronomical body that orbits a star or stellar remnant. Learn about the history, theory, and diversity of planets, from the eight in the Solar System to the thousands of exoplanets discovered outside it.
This web page provides a comprehensive list of Solar System objects by orbit, from the Sun to the Oort cloud. It includes planets, dwarf planets, moons, asteroids, comets, and other small bodies, as well as their names, sizes, and features.
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.
Mercury is the smallest and innermost planet in the Solar System, with a highly elliptical orbit and a large iron core. Learn about its physical characteristics, orbit, rotation, surface features, history of observation, and more from this comprehensive article.
A giant planet, also known as a jovian planet, is a diverse type of planet much larger than Earth, composed of low-boiling point materials. There are four giant planets in the Solar System: Jupiter, Saturn, Uranus, and Neptune, which have different compositions and are sometimes called gas giants or ice giants.