The radius of the red giant sun will be 100 times what it is now, lying just beyond the Earth's orbit, so the Earth will plunge into the core of the red giant sun and be vaporized. The sun will increase and it will become a red giant, an elderly star. As the outer layers expand, the radius of As the core contracts, it heats up and this heats the upper Of gravity however, some hydrogen fusion will occur in the upper The core runs out of hydrogen fuel, it will contract under the weight Will continue to expand at the same rate. Meaning it has a bit over 5 billion years left, and during this time it It has enough hydrogen fuel to 'burn' for about 10 billion years, Over its 4.5 billion years of life, the sun's radius has gotten about 6 percent bigger. The release of energy from nuclear fusion and the inward pull of gravity. The size of the sun is a balance between the outward pressure made by The Fate of the Sun The sun has been shining for about 4.5 billion years. The movements of the gas and by its immense gravity. Reactions that produce its energy, by the magnetic fields resulting from Of the major features of the sun can be explained by the nuclear

Corona - The extremely hot outermost layer, extending outward several million miles from the chromosphere.Chromosphere - The area between the photosphere and the corona hotter than the photosphere.Photosphere - The innermost part of the sun's atmosphere and the only part we can see.Convective zone - The outermost ring of the sun, comprising the 30 percent of its radius.Ībove the surface of the sun is its atmosphere, which consists of three parts:.Radiative zone -The section immediately surrounding the core, comprising 45 percent of its radius.Core - The center of the sun, comprising 25 percent of its radius.The three major structural areas of the sun: However, it still has aĭefined structure. There are lots of G2s out there, and Earth's sun is merely one of billions of stars that orbit the center of our galaxy, made up of the same substance and components. Officially, the sun is classified as a G2 type star, based on its temperature and the wavelengths or spectrum of light that it emits. The difference is distance - the other stars we see are light-years away, while our sun is only about 8 light minutes away - many thousands of times closer. The sun is a star, just like the other stars we see at night.

Science definition of photosphere