Category: Space > Hydrogen
Hydrogen is the most abundant element in the universe, making up about 75% of its elemental mass. This lightweight gas plays a crucial role in the life cycle of stars, as it is the primary fuel for nuclear fusion in stellar cores. When hydrogen atoms fuse together under immense pressure and temperature, they form helium and release a tremendous amount of energy in the form of light and heat. This process not only powers stars but also creates the elements that make up everything we see around us, from planets to living organisms. Furthermore, hydrogen's presence in vast interstellar clouds serves as the foundation for star formation, making it a vital ingredient in the evolution of the cosmos.