Subtopic ball of fire is one of the

Subtopic 1: You open your eyes to a blinding light shining through the window, as if shaking you awake. You sit up in bed, your room is full of light. While walking to school, going out to lunch, and playing outside, this light guides you through every day that you live. This is no guardian angel, this is our main source of light and heat, and our nearest star: the Sun. It is 92 million miles away from Earth, yet so bright that any being would be blinded if they ever dared to look directly at the Sun. It is one of billions of stars in the galaxy. Although the Sun is an ordinary star, without it Earth would be frozen and dark. Providing heat, light, energy, plants to grow, and life, this blazing ball of fire is one of the most crucial things to any living being on the planet Earth. People found out about the Sun in a rather interesting way. Greeks originally thought that the Sun was a god, bringing light, heat, and life to the planet earth. A couple centuries later, Aristotle said that the Sun was made of pure fire. Later on, in the 1900’s, people started to be able to see the Sun more clearly. Scientists discovered that other stars actually shine more brightly than the Sun, and have more mass. But, it would be a terrible mistake to call the Sun small. About 1 million Earths would fit inside the Sun. The Earth is an ant, and the Sun is a basketball. Thinking about it that way, you can see more clearly how enormous the Sun is.Subtopic 2: Speaking of size, the Sun is very large compared to the rest of the Solar System.The sun is 99.8 percent of the Solar System’s mass. The planets are only 0.2 percent of the Solar System’s mass.  “The Sun’s mass is about 2.2 × 1027 tons (2 × 1027 metric tons) This number would be written out as a 2 followed by 27 zeros,” says the World Book article. The World Book article also states that “for every 1 million atoms of hydrogen in the entire sun, there are 98,000 atoms of helium, 850 of oxygen, 360 of carbon, 120 of neon, 110 of nitrogen, 40 of magnesium, 35 of iron, and 35 of silicon.” These gases make the Sun very hot and explosive. Subtopic 3: Although the Sun seems to be just a mixture of gases, it is not just one big ball of fire. It is actually more complex.  The sun has many layers: The core, the radiative zone, the convection zone, the photosphere, the chromosphere, and the corona. “The core contains almost half of the Sun’s mass,” says World Book article. It is the center of the sun. Then, another layer almost like an outer core lies the radiative zone. According to the World Book article about the Sun, “The radiative zone gets its name from the fact that energy travels through it mainly by radiation.” Then, after that is the convection zone. It is the highest layer of the Sun below the surface. Above the convection zone is the photosphere. The light we see every day comes from this layer. Next up is the chromosphere. It does not really do much, it is a thin layer. The World book article says that “the main characteristic of this zone is a rise in temperature…” Then, last but not least, the corona, which is the surface, consisting of ionized gases.