Astronomy is the scientific study of celestial objects such as stars, planets, comets, and galaxies, as well as the phenomena that originate outside the Earth's atmosphere, including cosmic background radiation and cosmic rays. It is one of the oldest sciences, and has been practiced in various forms for thousands of years.
Throughout history, many astronomers have made significant contributions to our understanding of the universe. Some key figures include:
To excel in astronomy, consider the following study tips: