94% of the Universe Is Already Gone Forever

Script written by Nathan Clarke Right now, as you read this, galaxies are crossing an invisible boundary in the universe. When they cross it, they are gone. Not switched off. Not moved somewhere else. Gone — permanently, with no technology and no amount of time able to bring them back. Of every galaxy visible in the Hubble and James Webb images, roughly 94 percent is already beyond our reach. We can still see them because their ancient light is still arriving. But if any of them emitted a beam of light today, at this exact moment, it would never reach Earth. Not in a trillion years. We are looking at ghosts. In this video we explain what the cosmic event horizon is and why space itself can expand faster than light without breaking relativity. How a galaxy actually disappears — not instantly, but by reddening and fading exponentially until no instrument could ever detect it again. What the night sky will look like in 100 billion years, when the merged Local Group floats alone in an absolutely black void with no external galaxy visible in any direction. And then the part that is genuinely disturbing. In 2007, physicists Lawrence Krauss and Robert Scherrer published a paper titled The Return of a Static Universe and the End of Cosmology. Their argument: astronomers in that distant future, with telescopes as good as or better than ours, will see no external galaxies, measure no expansion, and find no cosmic microwave background. They will conclude the universe is a single static galaxy with no beginning and no end. They will be completely wrong. And there will be no way for them to know, because the physical evidence will no longer exist. Which raises an uncomfortable question about us. If they will lose evidence we currently have, what evidence did we already lose before we arrived? The universe is 13.8 billion years old and will exist for trillions more. We appeared inside the narrow window where enough is still visible to reconstruct where everything came from. That window is closing. Subscribe for weekly space documentaries. Sources: Krauss & Scherrer 2007 — The Return of a Static Universe and the End of Cosmology: https://arxiv.org/abs/0704.0221 NASA — Dark Energy: https://science.nasa.gov/universe/dark-energy/ NASA/ESA/CSA — Webb's First Deep Field: https://www.nasa.gov/image-article/nasas-webb-delivers-deepest-infrared-image-of-universe-yet/ NASA — Galaxies: https://science.nasa.gov/universe/galaxies/ #Universe #DarkEnergy #Cosmology #SpaceDocumentary #JamesWebb #Astronomy #BigBang #CosmicHorizon