Like other stars, the Sun shines by fusing hydrogen into helium in its core. Without the power that this conversion process generates, a star would collapse under its own immense weight. The heavier the star is, the faster it consumes its hydrogen and the sooner it dies. By the time our Sun becomes a senior citizen, most of its hydrogen will be gone and its core will consist of pure helium. With no more hydrogen …showed first 75 words of 544 total…

…showed last 75 words of 544 total…emits a distinctive deep red color. Scientists often study the chromosphere by filtering out all sunlight except the light that has the wavelength produced by hydrogen in the chromosphere. Corona= is the very hot layer of the solar atmosphere above the chromosphere. It extends to Earth and beyond as the solar wind. The sun's temperature rises to 2 million degrees Celsius at the bottom of the corona, and remains almost that hot as it reaches Earth.