The Universe - Creating Elements

In 1054, a star appeared that was so bright that it was visible in broad daylight for a short period of time and was visible at night for the following six months. Accounts were recorded by different cultures all over the world. It was later determined that this was a supernova, or an exploding star. In the past they were called "new stars" or "guest stars" because they appear suddenly and aren't usually seen for a very long period of time. The remnants of that 1054 supernova are seen by looking at the Crab Nebula with special equipment. A nebula is a cloud of gas and dust formed by a supernova.

All atoms have a built-in force of repulsion. To overcome this force of repulsion, high pressure and high temperatures are required to fuse atoms together. The process of fusing atoms together is known as nuclear fusion. As we speak, for example, our sun is constantly fusing three hydrogen atoms to form one helium atom, a process that releases large amounts of energy. All atoms (with the exception of hydrogen, some helium, and some lithium) are formed on the inside of stars by this process.