Outer space is the vast, seemingly infinite expanse that exists beyond the Earth's atmosphere. It is a near-perfect vacuum, containing very low densities of particles, primarily hydrogen and helium, along with cosmic rays and radiation. This region is home to celestial bodies such as stars, planets, moons, and galaxies, all of which are governed by the laws of physics. Exploration of outer space has captivated humanity for centuries, leading to significant advancements in science and technology. Missions like Apollo and Mars Rover have expanded our understanding of the universe, revealing the mysteries of black holes, supernovae, and the potential for extraterrestrial life.