Astronomi, or astronomy, is the scientific study of celestial objects, space, and the universe as a whole. It involves observing and understanding phenomena such as stars, planets, galaxies, and cosmic events. Astronomers use telescopes and other tools to gather data and analyze the properties and behaviors of these celestial bodies. The field of astronomy is divided into several branches, including astrophysics, which focuses on the physical properties of celestial objects, and planetary science, which studies planets and their moons. Astronomy has contributed to our understanding of the universe's origins, structure, and evolution, making it a fundamental science in exploring our place in the cosmos.