How Far Would You Have to Travel to Find Another Earth?

Finding another Earth sounds close at hand now that astronomers have confirmed more than 6,000 planets around other stars, yet the Earth-like planets that make headlines are usually judged on size and distance alone. This long space documentary leaves the Sun and travels outward, star by star, from Proxima b at 4.2 light years to the worlds of TRAPPIST-1 at 40 and K2-18 b at 124, stopping at each one to ask what it would actually be like to stand there. Flaring stars, locked planets, red skies, heavy gravity and the long search for air, told slowly and carefully. 0:00 Introduction 1:36 What makes Earth a home 13:47 Proxima b and its restless star 22:07 Two suns next door 30:20 Four small worlds at Barnard's Star 38:53 A sun that never moves 47:43 Tau Ceti and its crowded sky 56:05 The most Earth-like score 1:04:26 Seven worlds around TRAPPIST-1 1:13:18 A heavy world of ice and water 1:21:37 K2-18 b and the claim of life 1:30:03 The cousin and the numbers 1:47:48 The only Earth we know Sleeping Cosmos makes long space documentaries for drifting off, for studying beside, or for letting a long day go. Each one travels a great distance out into the universe and slowly finds its way home again, carefully researched and gently told, one story at a time. Good for: 📖 Reading or studying, with the nearest stars passing quietly in the background 🌙 Falling asleep to a long, slow walk past other worlds 🍵 Unwinding at the end of the day, one star at a time Where to read more: Barnard's Star and its four small planets, AAS Nova, 2025 https://aasnova.org/2025/03/11/confir... Webb finds no Earth-like air on TRAPPIST-1 d, ESA, 2025 https://www.esa.int/Science_Explorati... The icy, possibly ocean-bearing world LHS 1140 b, Université de Montréal release https://astrobiology.com/2024/07/11/w... Why the signs of life on K2-18 b are still in doubt, Astronomy magazine https://www.astronomy.com/science/new... How many Sun-like stars may have rocky habitable planets, NASA Ames, 2020 https://www.sciencedaily.com/releases... How long Earth's oxygen-rich air will last, Nature Geoscience study, 2021 https://www.newswise.com/articles/how... calm space documentary for sleep, relaxing science documentary for studying, facts about space to fall asleep to, how far away is the nearest earth like planet, could humans live on proxima b, what is the most earth like exoplanet, how long would it take to reach trappist 1, does lhs 1140 b have an atmosphere, is there life on k2 18b, how many earth like planets are in the milky way, what would it be like to stand on another planet, why are red dwarf planets tidally locked, when did earth get breathable air