Which types of science seeks to answer questions about the universe for the sake of gaining knowledge?

The types of science that seek to answer questions about the universe for the sake of gaining knowledge are primarily fundamental or basic sciences, such as astrophysics, cosmology, and theoretical physics. These fields focus on understanding the underlying principles of the universe, exploring phenomena like the origin of the cosmos, the nature of black holes, and the fundamental forces of nature. Unlike applied sciences, which aim for practical applications, these disciplines prioritize knowledge expansion and theoretical exploration.