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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.
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 ...
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.
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.
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.
Euler diagram showing the types of bodies orbiting the Sun. The following is a list of Solar System objects by orbit, ordered by increasing distance from the Sun.Most named objects in this list have a diameter of 500 km or more.
Neptune is the fourth-largest and third-most-massive planet in the Solar System, and the densest giant planet. It orbits the Sun at an average distance of 30.1 AU (4.5 billion km), the farthest from the Sun of any known planet.