Let me try to break down for you Einstein’s Theory of Relativity in plain terms: The stronger the gravitational pull near you, the slower time moves for you compared to someone far away from it. In Interstellar, time moves slower the closer you are to a massive gravitational pull like a black hole. So while Cooper spent hours on that water planet, years were passing back on Earth. Gravity affects and bends time, the stronger the gravity (like when they were very close to a black hole), the slower time moves for you compared to everyone else. In physics/astrophysics, this is called Time dilation and is explained by Einstein’s general theory of relativity. -
