Interstellar was a science fiction novel that mainly involved the following scientific concepts: Relativistic theory: Relativistic theory is a theory that describes the motion of objects in high-speed motion or high-gravity fields. In the novel, the protagonist, Cooper, and Einstein studied the theory of relativity together and tried to solve the problem of time travel. Black hole: A black hole is an extremely dense object with a gravitational field that is powerful enough to attract any matter, including light. In the novel, Cooper and others learned about the nature of black holes by observing the light near their event horizons. Gravitational waves: Gravitational waves are fluctuations caused by the gravitational interaction between objects. In the novel, the protagonists tried to determine if there were supernatural forces in the universe by observing gravitational waves. Cosmology: Cosmology is the study of the origin, evolution, and structure of the universe. In the novel, the protagonists learned about the early history and evolution of the universe by observing the cosmic microwave background radiation. Quantum mechanics: Quantum mechanics is a physics theory that describes the behavior of matter and energy in the microscopic world. In the novel, the protagonists tried to understand the mysteries of the universe by studying the behavior of atoms and molecules. Interstellar covered many scientific fields, including the theory of relativity, black holes, gravitational waves, cosmos, and quantum mechanics. These concepts and theories provided an important foundation for human exploration of the universe and nature.