unlocked puzzles of science

Introduction The vast empty space surrounding the planets and stars is called as the universe. It consists of dark matter,dark energy ,stars and galaxies. Both cyclic and unpredictable processes are found to happen in the universe. Cosmology is the study of nature and origin of the universe. Thousands of years before smartphones or Mario Kart, people entertained themselves by peering at the night sky and connecting the stars to create pictures called constellations- of animals ,objects and legendary heroes. Today ,the heavens are no less entertaining but a bit mysterious mystery where so many great minds working to solve the unlock puzzles of secrets. Universe is believed to have originated about 15 billion years ago through big bang (Lemaitre,1931) or thermonuclear explosion of an extremely sense entity. It began to expand. Cosmic material is still expanding. Big Bang theory The 'big bang' is the name for the leading  theory behind the birth of everything:atoms,light ,gravity ...