The film’s ending is a masterclass in narrative closure. Cooper sacrifices himself to ensure Brand (Anne Hathaway) can reach Edmunds’ planet. Instead of dying, he falls into the black hole Gargantua and enters a tesseract, a higher-dimensional space where he is able to communicate with his daughter, Murph, across time and space. This enables her to solve the gravity equation that ultimately saves humanity. Cooper is then ejected back into normal space, setting off on a journey to reunite with Brand on her new world. While this leaves the door open for a thematic continuation, it closes the core character arc of a father fighting across time to save his children, and of humanity finding a new home.
Below is an article that addresses both the reality of the film franchise and the dangers of the specific keyword search you mentioned. Interstellar 2 Hdhub4u