Copyright © Philip M. Parker, INSEAD. Terms of Use.
Definition: Solar System |
Solar SystemNoun1. The sun with the celestial bodies that revolve around it in its gravitational field. Source: WordNet 1.7.1 Copyright © 2001 by Princeton University. All rights reserved. |
| Domain | Definition |
Aerospace | The sun and other celestial bodies within its gravitational influence, including planets, asteroids, satellites, comets, and meteors. (references) |
Geography | A group of celestial bodies held around a star by its gravitation. Source: European Union. (references) |
Source: compiled by the editor from various references; see credits. | |
(From Wikipedia, the free Encyclopedia)
A generic solar system (or planetary system) consists of at least one star and various orbiting objects (such as asteroids, comets, moonss, and planets). The planet Earth is located within our solar system, which is usually just called the solar system; others being referred to as planetary systems to avoid confusion. This terminology will be used below.
There are a wide variety of objects present in the solar system that fall under various different categories. In recent years many of these categories have been found to be less clear-cut than once thought. This encyclopedia employs the following divisions:
Cosmogony is the academic discipline which deals with the formation of planetary systems. Planetary systems are generally believed to form as part of the same process which results in star formation; although, some argue that systems are formed by some kind of accidental "stellar near-collison". The more common theory argues that the objects of a planetary system developed from a solar nebula.
The solar system is part of the Milky Way galaxy, a spiral galaxy with a diameter of about 100,000 light years containing approximately 200 billion stars, of which our Sun is fairly typical.
Estimates place the solar system at between 25,000 and 28,000 light years from the galactic center. Its speed is about 220 kilometers per second, and it completes one revolution every 226 million years.
The solar system appears to have a very unusual orbit. It is both extremely close to being circular, and at nearly the exact distance at which the orbital speed matches the speed of the compression waves that form the spiral arms. The solar system appears to have remained between spiral arms for most of the existence of life on Earth. The radiation from supernovas in spiral arms could theoretically sterilize planetary surfaces, preventing the formation of large animal life on land. By remaining out of the spiral arms, the Earth may be unusually free to form large animal life on its surface.
Because of the geocentric perspective from which humans viewed the solar system, its nature and structure were long misperceived. The apparent motions of solar system objects as viewed from a moving Earth were believed to be their actual motions about a stationary Earth. In addition, many solar system objects and phenomena are not directly sensible by humans without technical aids. Thus both conceptual and technological advances were required in order for the solar system to be correctly understood.
The first and most fundamental of these advances was the Copernican Revolution, which adopted a heliocentric model for the motions of the planets. Indeed, the term "solar system" itself derives from this perspective. But the most important consequences of this new perception came not from the central position of the Sun, but from the orbital position of the Earth, which suggested that the Earth was itself a planet, and the planets other Earths. This was the first indication of the true nature of the planets. Also, the lack of perceptible stellar parallax despite the Earth's orbital motion indicated the extreme remoteness of the fixed stars, which prompted the speculation that they could be objects similar to the Sun, perhaps with planets of their own.
Until recently, the solar system was the only known example of a planetary system, although it was widely believed that other comparable systems did exist. A number of such systems have now been detected, although the information available about them is very limited. The technique employed involves the detection through the Doppler effect of periodic variations in the motion of parent stars which is attributed to the presence of planets. This allows the mass and orbital characteristics of the unseen planets to be determined. Unfortunately the sensitivity of these techniques currently does not permit the detection of planets of mass and orbit comparable to the Earth.
All attributes below are measured relative to the Earth:
Solar system objects
Origin and evolution of planetary systems
Orbit of the solar system
Discovery and exploration of the solar system
The solar system and other planetary systems
Attributes of Major Planets
| Planet | Equatorial diameter |
Mass | Orbital Radius |
|---|---|---|---|
| Mercury | 0.382 | 0.06 | 0.38 |
| Venus | 0.949 | 0.82 | 0.72 |
| Earth | 1.00 | 1.00 | 1.00 |
| Mars | 0.53 | 0.11 | 1.52 |
| Jupiter | 11.2 | 318 | 5.20 |
| Saturn | 9.41 | 95 | 9.54 |
| Uranus | 3.98 | 14.6 | 19.22 |
| Neptune | 3.81 | 17.2 | 30.06 |
| Pluto* | 0.24 | 0.0017 | 39.5 |
*Pluto traditionally has been considered a planet. However now that we have learned more about the variety of bodies in the solar system we can see that its composition and orbit indicate that it has much more in common with Kuiper belt objects than it has with the rest of the planets. Therefore some astronomers no longer class Pluto as a planet.
The total surface area of the solar system's objects that have solid surfaces and diameter > 1km is ~ 1.7 × 109 km2. ([1])
It has been suggested that the Sun may be part of a binary star system, with a distant companion named Nemesis. Nemesis was proposed to explain some regularities of the great extinctions of life on Earth. The theory says that Nemesis creates periodical perturbations in the asteroids and comets of the solar system causing a shower of large bodies and some of them hit Earth causing destruction of life. After this theory was stated, a search was undertaken for such a dim, distant companion; it found no visible star within one light-year of the Sun.
Other facts
Mosaic of the planets of the solar system. Note: planets are not portrayed in the same scale.
Source: adapted by the editor from Wikipedia, the free encyclopedia under a copyleft GNU Free Documentation License (GFDL) from the article "Solar system."
Synonym: Solar SystemSynonym: Meteors. (additional references) |
| Context | Synonyms within Context (source: adapted from Roget's Thesaurus). |
World | Sun, orb of day, Apollo, Phoebus; photosphere, chromosphere; solar system; planet, planetoid; comet; satellite, moon, orb of night, Diana, silver-footed queen; aerolite, meteor; planetary ring; falling star, shooting star; meteorite, uranolite. |
| Source: adapted from Roget's Thesaurus. | |
| Domain | Usage | |
Screenplays | -- give the Solar System an enema, that's where they stick the tube in. We've heard that one! (Saturn 3; writing credit: Martin Amis; John Barry) Saturn 3. When they want to give the Solar System -- (Saturn 3; writing credit: Martin Amis; John Barry) | |
Lyrics | There's a new planet in the solar system (The Great Beyond; performing artist: R.E.M.) | |
Movie/TV Titles | The Solar System (1950) | |
Source: compiled by the editor from various references; see credits. | ||
| Domain | Title | ||
Books | |||
Theater & Movies | |||
Music |
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High Tech |
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Source: compiled by the editor from various references; see credits. | |||
| Thumbnail | Description & Credit | Thumbnail | Description & Credit |
 | Solar System Montage. Credit: NASA. |  | The Hubble Space Telescope is hot on the trail of a puzzling new class of solar system object ... Credit: NASA. |
 | Looming like a giant flying saucer in our outer solar system, Saturn puts on a show as the ... Credit: NASA. |  | NASA diagram of how the frames for the Solar System Family Portrait were taken. Credit: NASA. |
 | Three-color filter image of the Galilean satellite, Io, one of the most volcanically active bodies in the solar system. Credit: NASA. |  | Global mosaic of Mars. Visible in the center of this mosaic isthe largest known chasm in the solar system, Valles Marineris. Reproduced from Volume 14 of theMars Digital Image Model (MDIM) CD-ROM set. Credit: NASA. |
 | The largest known volcano in the solar system, Olympus Mons. Reproduced from Volume 14 of theMars Digital Image Model (MDIM) CD-ROM set. Credit: NASA. |  | Solar System. Credit: NASA. |
 | Solar system diagram with seven planets in circular orbits, the earth as number V, Telluris; and surrounding text. Credit: Library of Congress. |  | Geometric figure of earth, sun, and moon calculated by Aristarchus to approximate real scale of the solar system. Credit: Library of Congress. |
Source: pictures compiled by the editor from various references; see picture credits. | |||
| Subject | Topic | Quote |
Economic History | Spain | Under a 1964 agreement (currently being renegotiated), the U.S. National Aeronautics and Space Adminstration (NASA) and the Spanish National Institute of Aerospace Technology (INTA) jointly operate the Madrid Deep Space Communications Complex in support of Earth orbital and solar system exploration missions. (references) |
Source: compiled by the editor from ICON Group International, Inc.; see credits. | ||
Expression using "solar system": the solar system. Additional references. | |
| Source: compiled by the editor from various references; see credits. |
| The following statistics estimate the number of searches per day across the major English-language search engines as identified by various trade publications. Hyperlinks lead to commercial use of the expression at Amazon.com. |
| Language | Translations for "solar system"; alternative meanings/domain in parentheses. | ||||||||||||||||||||||||||||||||||||||||||||||
Czech | Sluneční soustava. (various references) | ||||||||||||||||||||||||||||||||||||||||||||||
Danish | solsystem. (various references) | ||||||||||||||||||||||||||||||||||||||||||||||
Dutch | zonnesysteem. (various references) | ||||||||||||||||||||||||||||||||||||||||||||||
Finnish | aurinkokunta. (various references) | ||||||||||||||||||||||||||||||||||||||||||||||
French | système solaire. (various references) | ||||||||||||||||||||||||||||||||||||||||||||||
German | sonnensystem. (various references) | ||||||||||||||||||||||||||||||||||||||||||||||
Greek | ηλιακό σύστημα. (various references) | ||||||||||||||||||||||||||||||||||||||||||||||
Hebrew | מערכת "שמש. (various references) | ||||||||||||||||||||||||||||||||||||||||||||||
Indonesian | tata surya. (various references) | ||||||||||||||||||||||||||||||||||||||||||||||
Italian | sistema solare. (various references) | ||||||||||||||||||||||||||||||||||||||||||||||
Japanese Kanji | 太陽系 , ソーダ石灰 (saute, Seoul, soap, soarer, social worker, society, socket, socks, Socrates, soda lime, solar, sonata, sort, sortie, sorting, soul, sword, Turkish baths associated with prostitution). (various references) | ||||||||||||||||||||||||||||||||||||||||||||||
Japanese Katakana | たいようけい, ソーラーシステ . (various references) | ||||||||||||||||||||||||||||||||||||||||||||||
Manx | corys ny greiney. (various references) | ||||||||||||||||||||||||||||||||||||||||||||||
Pig Latin | olarsay ystemsay sistema solar. (various references) sistemul solar (the solar system). (various references) солнечная система (planetary system). (various references) sunčev sistem, solarni sistem. (various references) sistema solar. (various references) solsystem. (various references) güneş sistemi. (various references) | ||||||||||||||||||||||||||||||||||||||||||||||
Misspellings | |
"Solar System" is suggested in spellcheckers for the following: sola system. (additional references) | |
| Source: compiled by the editor, based on several corpora (additional references). | |
Scrabble® Enable2K-Verified Anagrams | |
| Words within the letters "a-e-l-m-o-r-s-s-s-t-y" | |
-3 letters: amyloses, lamsters, lassoers, maestros, maltoses, masterly, mastless, mayoress, molasses, morasses, ramosely, starless, systoles, tramless. | |
-4 letters: amylose, armless, armlets, artless, asserts, assorts, estrays, lamster, lassoer, lassoes, lasters, lessors, lysates, maestro, maltose, masters, mastery, matless, merlots, molests, molters, morales, morassy, morsels, mortals, mossers, motleys, myrtles, mysosts, oarless, ostlers, oysters, rassles, rayless, salters, samlets, saroses. | |
| Source: compiled by the editor from various references; see credits. SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro. | |
| 1. Definition 2. Synonyms 3. Crosswords 4. Usage: Modern | 5. Usage: Commercial 6. Images: Slideshow 7. Images: Photo Album 8. Quotations: Non-fiction | 9. Expressions 10. Expressions: Internet 11. Translations: Modern 12. Derivations | 13. Anagrams 14. Bibliography |
Copyright © Philip M. Parker, INSEAD. Terms of Use.
