Helium gas is a colorless, odorless, and tasteless substance that is lighter than air. It is the second most abundant element in the universe, primarily found in stars, including our Sun. Helium is non-toxic and non-flammable, making it safe for various applications. One of the most common uses of helium is in balloons, where it provides lift due to its low density. Additionally, helium is used in scientific research, medical imaging, and as a cooling agent in cryogenics. Its unique properties make it essential in many technological and industrial processes.