Sun
Our closestr star; the sun. Most people don't really know what the sun does or what it is made out of. Some people don't even know that the sun is a star. Well since the formation of the sun the earth and other planets would not have existed if it wasn't for the sun's warmth and brightness. What's funny though is that the sun is only slightly denser than water, so it can almost float. The sun is a very perplexing and interesting topic. There is so many ways people believe how the sun was formed and how it's going to die.
The ancients thought that the sun was the worlds' number one source for everything, telling time, plants and crops were planted around the sun's phases. They worshiped the sun and everything that had to do with it. The Egyptians were the first ones to really worship the sun. Before Christ the Egyptians started using a 365 day calendar based on the solar phases. And even today we use the same form as the Egyptians calendar.
The sun exists because of fusion. Fusion happens in the core and the minimum temperature that fusion can happen is 16,000,000 degrees Calvin, which means the core is very hot. Fusion is the process by which 2 atoms combine to make energy. This makes the sun and other stars "shine." For the sun it combines hydrogen atoms and converts it to helium. Every second the sun spends 700 billion tons of hydrogen protons fusing together, but only .7% of that energy turns into light.
Just outside of the core is a layer called the radioactive layer. The temperature of this layer is 4 million degrees Calvin. The density of the radioactive layer is much less than that of the core, but it contains 60% of the sun's mass and 90% of the volume. The core keeps so hot because the radioactive layer puts the pressure on the core. The radioactive layer is so hot that it's almost transparent. After the fusion starts at the core that energy moves in huge cells several kilometers in diameter. Finally that energy passes the...
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