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Created page with "thumb|Illustration of the Solar System showing the Sun, planets, and their orbits. The '''Solar System''' consists of the Sun and all celestial objects bound to it by gravity. These include eight planets, their moons, dwarf planets, asteroids, comets, meteoroids, and interplanetary dust.<ref>{{Cite book |title=The Solar System |author=Chaisson, E., and McMillan, S. |year=2022 |publisher=Pearson Education |isbn=978-0134591289}}</ref> The..." |
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{{SHORTDESC:The Sun, its planets and their moons}} | |||
[[File:Solar system.jpg|thumb|Illustration of the Solar System showing the Sun, planets, and their orbits.]] | [[File:Solar system.jpg|thumb|Illustration of the Solar System showing the Sun, planets, and their orbits.]] | ||
The '''Solar System''' consists of the [[Sun]] and all celestial objects bound to it by gravity. These include eight [[planet]]s, their moons, dwarf planets, asteroids, comets, meteoroids, and interplanetary dust.<ref>{{Cite book |title=The Solar System |author=Chaisson, E., and McMillan, S. |year=2022 |publisher=Pearson Education |isbn=978-0134591289}}</ref> The Solar System is located in the [[Milky Way]] galaxy, within the Orion Arm.<ref>{{Cite web |title=Solar System Exploration |url=https://solarsystem.nasa.gov/ |publisher=NASA |access-date=2025-01-09}}</ref> | The '''Solar System''' consists of the [[Sun]] and all celestial objects bound to it by gravity. These include eight [[planet]]s, their moons, dwarf planets, asteroids, comets, meteoroids, and interplanetary dust.<ref>{{Cite book |title=The Solar System |author=Chaisson, E., and McMillan, S. |year=2022 |publisher=Pearson Education |isbn=978-0134591289}}</ref> The Solar System is located in the [[Milky Way]] galaxy, within the Orion Arm.<ref>{{Cite web |title=Solar System Exploration |url=https://solarsystem.nasa.gov/ |publisher=NASA |access-date=2025-01-09}}</ref> | ||
Latest revision as of 11:30, 9 January 2025
The Solar System consists of the Sun and all celestial objects bound to it by gravity. These include eight planets, their moons, dwarf planets, asteroids, comets, meteoroids, and interplanetary dust.[1] The Solar System is located in the Milky Way galaxy, within the Orion Arm.[2]
Composition
Sun
The Sun is the central star of the Solar System and accounts for 99.86% of its total mass. It provides light and heat, making life possible on Earth. The Sun's immense gravitational pull holds the Solar System together. [3]
Planets
The Solar System has eight recognized planets, divided into two categories:
- Terrestrial planets: Mercury, Venus, Earth, and Mars. These are rocky planets with solid surfaces.
- Gas giants: Jupiter and Saturn. These are massive planets primarily composed of hydrogen and helium.
- Ice giants: Uranus and Neptune. These planets have thick atmospheres of methane, water, and ammonia.
Dwarf Planets
The Solar System contains several dwarf planets, including:
Small Solar System Bodies
In addition to planets and dwarf planets, the Solar System includes:
- Asteroids: Mostly found in the Asteroid Belt between Mars and Jupiter.
- Comets: Icy objects that develop tails when they approach the Sun.
- Meteoroids: Small rocky or metallic objects that sometimes enter Earth's atmosphere as meteors.
Structure and Organization
The Solar System is organized into several regions:
- Inner Solar System: Includes the Sun, terrestrial planets, and the asteroid belt.
- Outer Solar System: Contains the gas and ice giants.
- Kuiper Belt: A region of icy bodies beyond Neptune, including Pluto.
- Oort Cloud: A hypothetical distant sphere of icy objects surrounding the Solar System.
Formation
The Solar System formed approximately 4,600 million years ago from a molecular cloud of gas and dust. A rotating disk of material collapsed under gravity, forming the Sun at its center. The remaining material coalesced to form planets, moons, and other celestial objects. This process is known as the nebular hypothesis.
Importance
The Solar System provides a framework for studying planetary science, astronomy, and the potential for life beyond Earth. Understanding its dynamics helps scientists explore the origins of the universe and Earth's place in it.
External Links
References
- ↑ The Solar System. Pearson Education, 2022. ISBN 978-0134591289.
- ↑ "Solar System Exploration". NASA. https://solarsystem.nasa.gov/.
- ↑ The Early Solar System. Nature Astronomy, Vol. 3 , pp. 177-181 (2019). doi:10.1038/s41550-018-0654-4