The Solar System consists of the Sun and those celestial objects bound to it by gravity, all of which formed from the collapse of a giant molecular cloud approximately 4.6 billion years ago. Of the retinue of objects that orbit the Sun, most of the mass is contained within eight relatively solitary planets whose orbits are almost circular and lie within a nearly-flat disc called the ecliptic plane. The four smaller inner planets, Mercury, Venus, ...
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System Age:
- 4,600,000,000 yr.
Works Written About This Topic:
- The Secret of the Universe ,
- Exploring the Earth and the Cosmos ,
- Worlds in Collision ,
- The Case For Mars ,
- The Mars mystery ,
- Stargazers and Gravediggers ,
- Puzzling questions about the solar system ,
- The sun is my favorite star ,
- Patrick Moore on Mars. ,
- The starry sky
Also known as:
- מערכת השמש
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- Star System
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