Scientific Thinkining Dec 2013 | Page 8

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BY Karim MOrgan

The Story Of A Solar System

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From our minor world, we can see numerous planets orbiting the Sun forming our Solar System, that's composed of eight planets, in addition to dwarf planets, moons, comets, and asteroids. It formed more than 4.5 billion years ago due to the collapse of a molecular cloud caused by gravity. The Sun dominates about 99.8% of the system's total mass with most of the remaining mass contained in Jupiter. Hence, what should you know about this cosmic system surrounding us?

To begin with, the Sun, a big star is a powerful center of attention. It commands the solar system, while pouring life-giving light, heat, and energy on Earth. Because of the Sun's remarkable size, its powerful gravity attracts all the other objects in the Solar System towards it. Simultaneously, these objects try to fly away from the Sun towards the emptiness of outer space until they become trapped halfway in between. By this, they start orbiting around the Sun. At first, ancient astronomers believed that the Earth was the center of the universe, and that the sun and all the other stars revolved around it. Then, Nicolaus Copernicus developed a mathematical system that described the solar system to prove that Earth and the other planets in our solar system orbit our sun. Galileo Galilei, Johannes Kepler and Isaac Newton followed later on in his footsteps by helping people understand its physics more clearly in the 17th century.

Our Solar system is intricately made of eight planets, named after Roman Dieties- Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. More than 170 moons were discovered, as well as the asteroid belt between Mars and Jupiter, the Kuiper belt and the scattered disc. There are also five dwarf planets in the Solar System: Ceres,

Pluto, Haumea, Makemake and Eris, in addition to comets, centaurs and interplanetary dust. In fact, six of the planets and three of the dwarf planets are orbited by moons. The invention of telescopes massively helped in the discovery of many planets, asteroids and comets. It was revealed that the home of comets lies far beyond the orbit of Pluto, in the Oort Cloud. Every once in a while, one of these comets will be thrown off of its orbit in the Kuiper Belt and hurled towards the inner Solar System where it slowly melts in a beautiful show of tail and light.

Consequently, we can see that the solar system is divided into three parts-inner,outer, and Trans-Neptune region. Inner solar system contains terrestrial planets-the four planets closest to the sun-and the asteroid belt, which are Mercury, Venus, Mars, and Earth. All are composed of rock and metal. Mercury is the smallest planet in the solar system after Pluto was referred to as a dwarf planet. In spite of its resembling to the rocky, neighboring planets, Earth's atmosphere, distance from the sun and other variables made it the sole planet offering home to millions of species of both plants and animals. In addition, A red planet with the largest volcano in the Solar system spurs us right onto Mars.