Why We Will Eventually Be Completely Alone | Jim Al-Khalili Documentary

What if a single flashing star rewrote our place in the cosmos? And why is the night sky dark at all? From Thomas Digges sketching stars into endless space after the 1572 supernova, to Henrietta Leavitt’s Cepheid code that let Edwin Hubble measure Andromeda with the Hooker telescope, this film follows the breakthroughs that cracked the scale of everything. Watch Euclid’s straight lines bend through Gauss and Riemann, then curve into Einstein’s general relativity. See Hubble’s redshifts reveal expanding space, glimpse the Big Bang’s afterglow hiding in TV static, and confront the surprise of accelerating expansion and dark energy. Along the way, a deceptively simple riddle becomes the key: if the universe is full of stars, why isn’t the night ablaze? The answer ties together distance, time, expansion, and what we can ever observe. Journey through the discoveries without losing the wonder, and feel the moment the darkness finally makes sense. Watch now to see how we mapped the shape, size and origin of everything without ever leaving Earth. #Cosmology #Hubble #Einstein #BigBang #DarkEnergy #Andromeda #CMB #OlbersParadox