What is astronomy?

Astronomy is the scientific study of celestial objects such as stars, planets, comets, and galaxies, as well as phenomena that occur outside Earth's atmosphere. Astronomers use observations and data collected from telescopes and other instruments to study the origins, evolution, and behavior of these objects and phenomena. Astronomy also involves the study of the physical and chemical properties of celestial objects, as well as the laws of physics that govern their behavior.

Astronomy is the scientific study of celestial objects (such as stars, planets, galaxies, and nebulae) and phenomena that originate outside the Earth's atmosphere (such as the cosmic microwave background). It encompasses the study of the evolution, physical and chemical properties, and dynamics of these objects, as well as the laws and principles that govern their behavior. Astronomy is a vast and interdisciplinary field that overlaps with many other scientific disciplines, including physics, mathematics, chemistry, and geology.