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| The Solar System |
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| The solar system consists of the sun and all the objects that travel around it. The solar system includes the earth and eight other planets, along with the satellites (moons) that travel around most of them; planet like objects called asteroids; chunks of iron and stone called meteoroids; bodies of dust and frozen gases called comets and drifting particles called interplanetary dust and electrically charged gas called plasma that together make up the interplanetary medium. |
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| Solar System |
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| The solar system is shaped like a disk. It is only a tiny part of a galaxy called the Milky Way. Distances within the solar system are measured in astronomical units (A.U). One astronomical unit equals the average distance between the earth and the sun - about 150 million kilometers. The distance between the sun and the outermost planet, Pluto, averages about 39 A.U. |
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