"Science is a systematic enterprise that builds and organises knowledge in form of testable explanations and predictions about the
universe (all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy. While the spatial size of the entire universe is still unknown,
it is possible to measure the observable universe). Modern science is typically divided into three major branches that consist of the natural sciences (biology, chemistry, and physics), which study nature in the broadest sense; the social sciences (economics, psychology, and sociology), which study individuals and societies and the formal sciences (logic, mathematics, and theoretical computer science), which study abstract concepts.
There is disagreement, however, on whether the formal sciences actually constitute a science as they do not rely on empirical evidence (the information received by means of the senses, particularly by observation and documentation of patterns and behavior through experimentation. The term comes from the Greek word for experience)."
Science - Wikipedia