The Universe

                          The Universe

Everything that exists- from sub atomic particles to the largest structures ever found forms the Universe. It is believed that the Universe contains about 100 billion galaxies of which each one has an average of 100 billion stars. Scientists are of different opinion about the origin of the Universe. The Big Bang Theory is the widely accepted theory about the origin. According to this theory the Universe initially consisted of an extra large ball of compressed mass and very high temperature. The high pressure and temperature caused a huge explosion between 15 and 20 billion years ago, resulting in the scattering of the compressed mass. Thus formed billions of galaxies including our galaxy called the Milky Way. It has not been proved yet whether the Universe is expanding further or contracting or remaining steady.