The SunThe sun is the largest object in the solar system. It is a medium-sized star and there are many other stars in the universe just like it. Even though it is only a medium-sized star, it is large enough to hold over 1 million planets inside it, if it were hollow. The temperature of the sun is far too high for any living being to tolerate. On the surface it is 10,000 degrees Fahrenheit and the core is a whopping 27,000,000 degrees Fahrenheit. But don't worry, we are more than 90,000 million miles away, the sun could never reach us, at least not yet. The sun is still a middle-aged star and will become a red giant later in its life. At this stage it will become bigger and closer to us causing an increase in temperature and most likely the end of the world as we know it, but this will not happen for a long time. But the sun is not our enemy, if it weren't for that big ball of burning gas there would be no life on this planet. We need its heat, its light and its energy. Without these our planet would be frozen like a large ice cube and there would never be any signs or traces of life. In total the sun provides us with about 2 kilos of energy every day. Yes, that's right, only £2. The sun evaporates water from the earth's lakes, streams, and rivers. It also heats the earth and cools it at the same time. Without the Earth's atmosphere to protect us from the sun's ultraviolet rays we would be toast. This is a bit like how the greenhouse effect happens. The greenhouse effect occurs when the earth's atmosphere traps heat from the sun and lets sunlight warm plants, but prevents much of the heat from escaping. Similarly, the atmosphere allows sunlight to pass to the earth's surface. Sunlight warms the earth, but the heat created cannot easily return through the atmosphere into space. Now, what happens to the sun? When we look up we simply see a bright object that warms us, sometimes burns us and gives us light, on the contrary. The sun is a mass of incandescent gas, a gigantic nuclear furnace where hydrogen is incorporated into helium at a temperature of millions of degrees. The sun is so hot that everything on it is gas. About 75% of the sun is made up of hydrogen, about 23% is helium, and the remaining percentage is made up of iron, copper, aluminum, and about 70 other elements found in the middle of paper. ..like Stonehenge, to see the shadow of the sun and tell the time of day. The ancients also used the sun to indicate direction, they knew that it rose in the east and set in the west every day, and that a full day was the time it took the sun to move from one edge of the horizon to the other. Ancient calendars were based on the phases of the moon. The phases occur because sunlight reflected from the moon is seen from different angles as the moon circles the earth. Even today the sun plays an important role in the detection and navigation of people. Surveyors can use the sun to calculate their location and other locations on earth. Well, that's pretty much a summary of the sun. While this essay may have brought out some true facts about the sun, there is still so much more to know about the sun. Some things we don't even know about the sun and may never know, but what we know is good. We know it's the largest object in the solar system, it's the size of 1 million earths and it's hotter than 27,000,000 earths in the core, this is boiling. Bibliography1. The World Book Encyclopedia, “sun” Robert W. Noyes2. Because the sun shines3. Science book