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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.
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.
Learn about the 300+ moons of the Solar System's planets and dwarf planets, their names, sizes, orbits and features. Compare the regular and irregular moons, the largest and smallest, the round and non-round ones, and the rings of Saturn.
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.
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.
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.
A table of the largest exoplanets discovered so far, ordered by radius and compared to Jupiter. The list includes planets, brown dwarfs, sub-brown dwarfs and rogue planets, with notes on their classification, mass, age and location.
The Galilean moons are the four largest moons of Jupiter, discovered by Galileo Galilei in 1610 with his telescope. They are the first Solar System objects to be found orbiting a planet other than Earth, and they are named after mythological characters.