In this short clip, Neil deGrasse Tyson breaks down why the speed of light remains constant no matter the observer's motion or the light source. Learn how this fascinating principle shapes our understanding of the universe!" #NeilDeGrasseTyson #SpeedOfLight #PhysicsExplained #ScienceFacts #Astrophysics #Relativity #ScienceShorts #LightSpeed #Cosmos #Einstein #shorts