- 1 Number of stars in the solar system
- 2 Solar Group
- 3 Facts about the solar system
- 4 References
Number of stars in the solar system
Our solar system is located in the outer spiral arm of the Milky Way vast, the sun is the only star known in the solar system,  Like other stars known as the sun as a ball of gas, but in terms of the number of atoms are made of hydrogen by 91.0% , and 8.9% helium, but with respect to its mass amounts to about 70.6% of hydrogen, 27.4% of helium and. 
The solar system from the sun consists of everything going on around him, including the planets, moons, asteroids, meteors, comets, and extends from the sun through the four inner planets through the asteroid belt to the four giants of gas, through to belt Keiber (in English: Kuiper Belt), scientists estimate that the edge of the solar system is just equivalent to 15 billion kilometers from the sun. 
Know the sun as the largest body in our solar system, which contains 99.8 percent of the solar system block, which is responsible for providing most of the heat and light, which makes life possible on Earth, it is worth mentioning that the planets revolve around the sun in the oval-shaped paths called " ellipses ", with a little sun outside the center. 
Facts about the solar system
Constitute the solar system since about 4.6 billion years, and there are eight planets in the solar system, which is as follows: the four inner planets; Namely: Mercury, Venus, Earth, and Mars, the four outer planets; Namely: Jupiter, Saturn, Uranus and Neptune, and is considered the inner planets, also known as smaller terrestrial planets, mostly of rock and metal, while the outer planets known as the giants of the largest gas that is considered much mostly of hydrogen and helium and other gases, in addition to the presence of Five dwarf planets; Namely: Pluto, and Ceres, and Eris, and Makmaki, and Haumea. 
- ↑ "our solar system", www.solarsystem.nasa.gov, Retrieved 23-8-2018. Edited.
- ↑ "our sun", www.solarsystem.nasa.gov, Retrieved 23-8-2018. Edited.
- ^ أ ب Charles Q. Choi (14-11-2017), "Solar System Facts: A Guide to Things Orbiting Our Sun"، www.space.com, Retrieved 12-8-2018. Edited.
- ↑ "Solar System Facts", www.sciencekids.co.nz, Retrieved 23-8-2018. Edited.
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