What is the Solar System?

Nowadays we hear about "flying saucers", and people wonder if there are other worlds where some sort of living creature might exist. The reason people can even imagine such things is that we know that our solar system is only a tiny part of the whole immense universe.

And scientists believe that there are probably millions of other "solar system" that may be similar to our own. A solar system is simply a sun and all the bodies around it that it controls by gravity. Our solar system is made up of all the planets, moons, asteroids, and comets that our sun controls by gravity. Our earth is simply one of the planets.

The planets vary greatly in size and distance from the sun. mercury is the smallest planet and the nearest to the sun. it goes around the sun in only 88 days. Venus is about 68 million miles from the sun, and goes around it in 225 days. The earth is 93 million miles from the sun.

Mars is about 142 million miles from the sun and goes around it in 687 days. Jupiter, which is about 483 million miles from the sun take 12 years to make one trip around it. Saturn, 886 million miles from the sun, takes 29 ½ years to make one orbit. Neptune takes 165 years. So you see, while these planets are part our solar system, each one is quite different and exists very different conditions.  

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