The universe comprises of millions of super clusters. These super clusters consist of hundreds of different sized galaxies. Of such a super cluster is our earth a part of. The super cluster consists of galaxies in the form of groups. The galaxy in which earth is situated is called Milky Way and is situated in a group called the local group which comprises of more than 30 galaxies (Caprara & Harris, 2003). The Milky Way is made up of a number of stars and constellations of stars, planets, rocks, sun, gaseous elements and other such similar things. Our earth is the part of a solar system which lies in the Milky Way galaxy. Our earth is the third planet from the sun. The Milky Way galaxy is extended in a number of directions and these extensions have been named as arms. The name of the arms has been given by the name of the constellation which can be observed in that particular direction. Orion spur is the name of one its minor arm in which our solar system is situated. It is placed at the far edge of the galaxy. The sun is approximately at a distance of 26,000 to 28,000 light years from the center of the Milky Way galaxy. 2. Electromagnetic Spectrum has been divided into different regions according to the difference in the values of the frequency and wavelength. Following are the types of waves comprising of the electromagnetic spectrum and their applications: 1.