June 21, 2009
The most important feature of our solar system is the Sun. It is the largest object in it, and contains almost 98% of the total mass of the solar system. The visible outer layer of the Sun is known as the photosphere, and its temperature is 6,000 degrees Celsius. Inside the Sun’s core, the creation of solar energy takes place. The temperature is so high that nuclear reactions take place, which causes four protons or hydrogen nuclei to fuse together, thus forming one alpha particle, or helium nucleus.