Solar system objects by size
Article
May 25, 2022
This is a list of solar system objects by size. The list is arranged in descending order starting from the object with the largest radius. The list contains the Sun, planets, dwarf planets, many of the largest minor bodies in the solar system, major natural satellites of planets and dwarf planets. The sorting can be different and it is also possible to sort it according to surface mass, volume, density or gravity, this is because some objects are denser than others, and can be more massive despite their smaller size. For example, Uranus is larger than Neptune, but less massive, and Ganymede and Titan, although larger than Mercury, have less than half its mass. There may be difficulties in estimating the diameter for objects beyond Saturn's orbit. The mass of many trans-Neptunian objects is uncertain, as there is no absolute certainty about their density. Furthermore, if the sizes and masses of the major moons of Jupiter and Saturn are well known due to missions that have thoroughly studied the systems, such as Cassini and Galileo, some parameters of the moons of Uranus and Neptune are not well understood, because the Voyagers only made a quick fly-by and the outer moons of Uranus for example remain partly unknown. The reliability of the data is therefore not uniform, bodies closer to the Earth or visited by space probes have a much higher degree of reliability than the small bodies placed at the edge of the solar system.