The Truth About Cosmic Distance | Brian Greene Explains

What if the distances we perceive across the cosmos are not what they truly seem? In this mind-expanding exploration, world-renowned theoretical physicist Brian Greene breaks down one of the most profound and counterintuitive ideas in modern cosmology — the cosmic illusion of distance. Beneath the surface of our everyday experience lies a world we'd hardly recognize — a startling reality far stranger and more wondrous than anyone expected. PBS Light from distant galaxies has to travel so far to reach us that when we look out at them, we are actually looking back in time. This means the universe we observe is not the universe as it is — but as it was, sometimes billions of years ago. Distance is not just space — it is time itself. PBS Much of what we thought we knew about our universe — that space is just an empty void, that our universe is the only universe that exists — just might be wrong. Brian Greene Join Brian Greene as he dismantles our assumptions about space, separation, and cosmic scale, and reveals the breathtaking truth hiding in plain sight across the night sky. 🔔 Subscribe for more frontier science, cosmology, and physics explained simply. 👍 Like & Share if this expanded your universe. #️⃣ HASHTAGS #briangreene #CosmicIllusion #DistanceInSpace #cosmology #TheFabricOfTheCosmos #theoryofrelativity #spacetime #quantumphysics #theoreticalphysics #universeexplained #scienceeducation #physicsforeveryone #lightyears #deepspace #cosmicscale #stringtheory #multiverse #spacescience #mindblown #scienceisamazing 🏷️ TAGS (comma-separated) Brian Greene, cosmic illusion of distance, fabric of the cosmos, space and time explained, theoretical physics, cosmology for beginners, what is spacetime, light years explained, universe illusion, physics of distance, Brian Greene lecture, deep space cosmology, relativity explained, speed of light, looking back in time, science documentary, NOVA physics, universe explained simply, space documentary, mind-bending science, modern physics, quantum cosmology ⚠️ DISCLAIMER This video is intended for educational and informational purposes only. The concepts, theories, and ideas presented are based on current scientific understanding and are subject to revision as new discoveries emerge. The views and explanations shared by Brian Greene represent scientific theory and mainstream cosmological research; they are not intended to conflict with any personal, philosophical, or religious beliefs. All rights to the original content belong to their respective owners. No copyright infringement is intended. Viewer discretion is advised for content involving complex scientific and theoretical concepts.