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The Solar System is the gravitationally bound system of the Sun and the objects that orbit it. It was formed about 4.6 billion years ago when a dense region of a molecular cloud collapsed, forming the Sun and a protoplanetary disc.
- Formation and evolution of the Solar System - Wikipedia
Since the dawn of the Space Age in the 1950s and the...
- Outline of the Solar System - Wikipedia
The following outline is provided as an overview of and...
- Portal:Solar System - Wikipedia
The Sun and planets of the Solar System (distances not to...
- Discovery and exploration of the Solar System - Wikipedia
True-scale Solar System poster made by Emanuel Bowen in...
- Solar System - Simple English Wikipedia, the free encyclopedia
The Solar System is the Sun and all the objects that travel...
- Formation and evolution of the Solar System - Wikipedia
- Evolution of The Solar System
- Orbits of The Planets
- Discovery and Exploration
- The Eight Planets
- Dwarf Planets
- Structure
- Ecliptic Plane
- More Reading
- Other Websites
The formation and evolution of the Solar System began 4.6 billion years ago with the gravitational collapse of a small part of a giant molecular cloud. Most of the collapsing mass collected in the centre, forming the Sun, while the rest flattened into a protoplanetary disk of loose dust, out of which the planets, moons, asteroids, and other Solar S...
The Earth's orbit around the Sun is nearly a perfect circle, but in a very slightly oval shaped orbit, an elliptical orbit. The other planets in the Solar System also orbit the Sun in slightly elliptical orbits. Mercury has a more elliptical orbit than the others, and there is obviously some explanation for this. Some of the smaller objects orbit t...
For thousands of years, people had no need for a name for the "Solar System". They thought the Earth stayed still at the center of everything (geocentrism). The Greek philosopher Aristarchus of Samos suggested that there was a special order in the sky. Nicolaus Copernicus was the first to develop a mathematical system that described what we now cal...
In their order from the Sun: 1. Mercury 2. Venus 3. Earth 4. Mars 5. Jupiter 6. Saturn 7. Uranus 8. Neptune The planets are the biggest objects that go around the Sun. It took people many years of using telescopes to find the objects that were farthest away. New planets might still be found, and more small objects are found every year. Most of the ...
Pluto was discovered by American astronomer Clyde Tombaughand was declared the 9th planet of the Solar System in 1930. This all changed on August 24, 2006, when the International Astronomical Union (IAU) decided on the correct definition for the word "planet" for the first time. By this definition, Pluto was not a planet anymore due to its irregula...
There are a few main parts of the Solar System. Here they are in order from the Sun, with the planets numbered, and the dwarf planetsmarked with the letters a to e.
The plane of the ecliptic is defined by the Earth's orbit around the Sun. All of the planets orbit the Sun roughly around this same orbital plane. The farther away from this plane a planet orbits, the more inclinedis its orbit to the ecliptic. If you could look at the Solar System "edge on" then all the planets would be orbiting more or less in the...
Lang, Kenneth R. (2011). The Cambridge Guide to the Solar System (2nd ed.). Cambridge University Press. ISBN 978-0521198578.Iggulden, Hal; Iggulden, Conn (2007). "The Solar System (a quick reference guide)". The Dangerous Book for Boys. New York: HarperCollins. pp. 217–224. ISBN 978-0061243585.Thierry Montmerle; Jean-Charles Augereau; Marc Chaussidon 2006. Solar System formation and early evolution: the first 100 million years. Earth, Moon, and Planets. Springer. 98(1–4): 39–95. Bibcode:...The Planets in the Solar System Archived 2021-07-10 at the Wayback MachineSince the dawn of the Space Age in the 1950s and the discovery of exoplanets in the 1990s, the model has been both challenged and refined to account for new observations. The Solar System has evolved considerably since its initial formation.
4 days ago · For a discussion of that action and of the definition of planet approved by the IAU, see planet. Understand the relative size of the Sun, the Moon, and other solar system objects. Learn about the comparative size of various solar system objects. See all videos for this article.
The following outline is provided as an overview of and topical guide to the Solar System: Solar System – gravitationally bound system comprising the Sun and the objects that orbit it, either directly or indirectly. Of those objects that orbit the Sun directly, the largest eight are the planets (including Earth), with the remainder being ...
The Sun and planets of the Solar System (distances not to scale) The Solar System is the gravitationally bound system of the Sun and the objects that orbit it. It was formed about 4.6 billion years ago when a dense region of a molecular cloud collapsed, forming the Sun and a protoplanetary disc.
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True-scale Solar System poster made by Emanuel Bowen in 1747. At that time, Uranus, Neptune, nor the asteroid belts have been discovered yet. Discovery and exploration of the Solar System is observation, visitation, and increase in knowledge and understanding of Earth's "cosmic neighborhood".
