astrophysics

This term describes the intersection of astronomy and physics, focusing on the physical properties of the universe rather than just the mapping of stars. It carries a highly academic and technical connotation, typically associated with research institutions, theoretical mathematics, and deep-space observation. As a field of study, this noun is uncountable. It refers to a body of knowledge or a scientific discipline, meaning it cannot be pluralized or counted as individual units. One would refer to a degree in astrophysics or a professor of astrophysics, rather than multiple astrophysics.