空间 (Space) refers to the vast, seemingly infinite expanse that exists beyond Earth's atmosphere. It is where celestial bodies like stars, planets, and galaxies are found. Space is a vacuum, meaning it has very low pressure and density, allowing objects to move freely without air resistance. In addition to its physical properties, space is also a subject of scientific study. Astronomers and physicists explore phenomena such as black holes, supernovae, and the Big Bang. Understanding space helps us learn about the universe's origins, structure, and the fundamental laws that govern it.