The universe is so vast that some stars have never been seen by human eyes. Their light is still traveling through space, billions of years later. This video reveals one of the most mind-bending cosmic facts ever discovered. Because light travels at a finite speed, every star and galaxy we see exists in the past. Astronomers explain that the observable universe spans about 93 billion light-years, yet the universe itself may be far larger or even infinite. Some stars and galaxies are so distant that their light has not reached Earth since the Big Bang. These regions exist beyond the cosmic light horizon, completely hidden from us forever. This is not science fiction but real astronomy backed by modern cosmology and NASA research. The mystery of the universe is not what we see, but what we will never be able to see. Subscribe for more mind-bending universe facts and deep-space mysteries. #Universe #SpaceFacts #CosmicMystery #Astronomy #NASA #DeepSpace #UniverseFacts #LightSpeed #BigBang #Cosmology #Galaxies #ScienceShorts #SpaceDiscovery