As we all know, the earth we live on is a planet surrounded by water. More than 70% of the earth’s surface is covered by oceans. But when we name the earth, why don’t we call it water polo? So let’s use the knowledge of constellations to reveal to you why the earth is not called water polo? Let’s take a look!
Why is the earth not called a water polo? The total surface area of ??the earth is about 510 million square kilometers. The water area is about 361 million square kilometers, accounting for about 71% of the total surface area of ??the earth. The land area is about 150 million square kilometers. It accounts for 29% of the total surface area of ??the earth. From space, the earth looks like a water polo, which is blue in color. Logically speaking, it should be called a water polo.
But in ancient times, people lived on land and had a small range of activities and observations. They were unable to recognize the full picture of the earth. In addition, ancient navigation technology was backward and they did not know that the ocean was vast. Therefore, the earth was not named water polo. , called Earth. When this name was given, people not only believed that the land in the world was larger than the ocean, but also believed that the land would always be flat. The Earth is the third planet from the inside to the outside of the solar system. It is also the terrestrial planet with the largest diameter, mass and density in the system.
Earth is the only name not derived from Greek or Roman mythology. The word Earth comes from Old English and Germanic languages. In Roman mythology, the earth goddess is called Tellus, which means fertile land (Greek: Gaia, Mother Earth).
The word "earth" in Chinese is said to come from the "Preface to the Complete Map of Mountains and Seas" written by Guo Zizhang of the Ming Dynasty for the world map drawn by the missionary Matteo Ricci, which said: "Li Shengzhi's "Illustration" says: The sky has two poles, north and south, and the earth also has them. The sky is divided into 360 degrees, and the earth is the same. Therefore, there is a celestial sphere, an earth, longitudes, and latitudes. The east, west, north, and south of the earth are respectively Ninety thousand miles in a week, the earth is more than 28,600 miles thick, with people living on all sides above and below. It is like a ball with no upper and lower parts. This is a saying that has never been heard in China for thousands of years. "
There is also a theory that the word "Earth" appeared in the Ming Dynasty because Western missionaries at that time introduced the Western geocentric theory to our country. They believed that the Earth and other planets were Completely different products, the earth is the center of all things, so they tried to distinguish the earth from other planets, so they created names different from other celestial bodies to call the earth.
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