The 1940's Essay

1507 WordsMay 10, 20137 Pages
DISCOVERING PLANETS There are many planets in the solar system, but they all are unique in their own ways. For year’s scientist have studied the wonders of the universe and all of its contents. These intelligent individuals discovered a variety of different ways to incorporate the knowledge of space and how it works into our everyday lives. Without this knowledge life as we know it wouldn’t be the same. Space study has not only provided us with knowledge but also enhanced the world’s technologies. We have yet to uncover everything about the universe. What have we already discovered? We’ve discovered a lot about the universe. For example, there are nine planets in our solar system and here are some descriptions of what we’ve learned about these ancient planets. Mercury is the closest planet to the sun and the eighth largest, named after the Greek messenger god Hermes. It is less than one half the Earths diameter. The planet probably received this name because it moves so quickly across the sky. Mercury has a large core of liquid metal surrounded by a mantle of silica and a solid outer crust. What makes this planet even more interesting is its speed. The planet Mercury travels faster than any other planet. Mercury’s day last almost two months on Earth. However, Mercury’s speed is what helps the planet resist being pulled into fiery heat of the sun by its gravitational pull. Mercury has now been visited by two spacecrafts, Mariner 10 and Messenger. There they discovered the surface of Mercury is similar to that of the Earth’s moon. It is covered with craters formed by meteors crashing into its surface. These craters are much larger and deeper because Mercury lacks an atmosphere. This planet is not capable of holding any oxygen, carbon dioxide, or nitrogen which makes up an atmosphere. Therefore erosion occurs slowly on Mercury. Venus was named after the

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