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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.
A dwarf planet is a small, round object that orbits the Sun but has not cleared its orbit of other objects. Learn about the origin of the term, the debate over Pluto's status, and the nine largest dwarf planets discovered so far.
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 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.
Learn about the definition, criteria and candidates of dwarf planets in the Solar System, based on the International Astronomical Union's guidelines. Compare the sizes, shapes, densities and compositions of Ceres, Pluto, Eris, Haumea, Makemake and other trans-Neptunian objects.
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.
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.