Dihydrogen is a chemical compound consisting of two hydrogen atoms, represented by the formula H2. It is the simplest and most abundant molecule in the universe, primarily found in stars and gas giant planets. Dihydrogen is a colorless, odorless gas at room temperature and is highly flammable. In addition to its natural occurrence, dihydrogen is used in various industrial processes, including the production of ammonia for fertilizers and in petroleum refining. It also plays a crucial role in the development of hydrogen fuel cells, which are considered a clean energy source for vehicles and other applications.