Imagine a world with no sunrise, ever. We've always thought life needs a star to survive, but recent studies suggest we might be totally wrong. 'Rogue planets', worlds cast out of their solar systems into the cold darkness of interstellar space, might actually be hosting life on their moons! Computer models show that an Earth-sized moon orbiting a Jupiter-like rogue planet could stay warm enough for liquid water for over 4.3 billion years. That’s basically the entire age of Earth. Without a sun, these moons rely on gravitational friction to keep things toasty. It's wild to think that the vast, 'empty' space between stars could actually be filled with hidden pockets of life. We are looking at a universe far more populated than we ever dreamed. The cradle of life doesn't need a sun; it just needs the right orbit. #science #space #discovery