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General characteristics. Astronomers sometimes divide the Solar System structure into separate regions. The inner Solar System includes Mercury, Venus, Earth, Mars, and the bodies in the asteroid belt. The outer Solar System includes Jupiter, Saturn, Uranus, Neptune, and the bodies in the Kuiper belt. [32]
A Cosmic History of the Solar System; A Tediously Accurate Map of the Solar System (web based scroll map scaled to the Moon being 1 pixel) NASA/JPL Solar System main page. NASA's Solar System Simulator; Solar System Profile by NASA's Solar System Exploration
Historical models of the Solar System. Approximate sizes of the planets relative to each other. Outward from the Sun, the planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Jupiter's diameter is about 11 times that of the Earth's and the Sun's diameter is about 10 times Jupiter's.
Solar System models, especially mechanical models, called orreries, that illustrate the relative positions and motions of the planets and moons in the Solar System have been built for centuries. While they often showed relative sizes, these models were usually not built to scale.
Pre-telescope[edit] See also: Planet ยง History, History of astronomy, Timeline of Solar System astronomy, and Historical models of the Solar System. Map of Anaximander 's universe (circa 560 BCE) The first humans had limited understanding of the celestial bodies that could be seen in the sky.
The Solar System is the gravitationally bound system of the Sun and the objects that orbit it. It was formed 4.6 billion years ago when a dense region of a molecular cloud collapsed, forming the Sun and a protoplanetary disc .
Historical models of the Solar System; History of astronomy; Timeline of cosmological theories; The number of currently known, or observed, objects of the Solar System are in the hundreds of thousands. Many of them are listed in the following articles: List of Solar System objects; List of gravitationally rounded objects of the Solar System
This article includes a list of the most massive known objects of the Solar System and partial lists of smaller objects by observed mean radius. These lists can be sorted according to an object's radius and mass and, for the most massive objects, volume, density, and surface gravity, if these values are available.
Contents. Formation and evolution of the Solar System. There is evidence that the formation of the Solar System began about 4.6 billion years ago with the gravitational collapse of a small part of a giant molecular cloud. [1] Most of the collapsing mass collected in the center, forming the Sun, while the rest flattened into a protoplanetary ...
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. The Sun, a spectral class G2V main-sequence star. The inner Solar System and the terrestrial planets.
