In our daily life, we come across different states of matter. In particular, the most common states of matter are solids, liquids, and gases, in order of decreasing density. If one talks to an astronomer, he will say that only about 5 percent of matter in the universe is in the form of visible matter (the rest being made up of dark matter and dark energy). Of the 5 percent visible matter, more than 90 percent of matter is in the form of the fourth state of matter, plasma. The plasma, although it is prevalent in the universe, is not easily detectable. The plasma can be created in the laboratory under very special

conditions. Most of the stars, our Sun is an ideal, are the natural laboratory of a plasma.