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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.
Learn about the largest stars in the Milky Way and other galaxies, measured by their radius in solar units. Compare different methods and sources of determining stellar radii, and see examples of red supergiants, luminous red novae, and supermassive stars.
This web page lists the stars, neutron stars, white dwarfs and brown dwarfs that are the least voluminous known. The smallest star by volume is PSR B0943+10, a pulsar with a radius of 2.6 km.
Proxima Centauri is the nearest star to the Sun, located 4.2465 light-years away in Centaurus. It is a red dwarf with a mass of 0.1221 M☉ and a flare star with two known exoplanets and one candidate exoplanet.
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 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.
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.