How Big Is the Universe, Really? 10 Jumps From Earth to the Edge

How big is the universe? Instead of piling up huge numbers, we measure everything with one ruler that never changes: light. Ten jumps take us from Earth to the Moon, the Sun, Voyager 1 (which reaches one light-day from Earth on November 18, 2026), the nearest star, the Milky Way, Andromeda, Laniakea, and finally the edge of the observable universe, about 93 billion light-years across. Chapters: 0:00 The measuring tape 0:27 Jump 1: Around the Earth 0:56 Jump 2: The Moon 1:21 Jump 3: The Sun 1:46 Jump 4: The planets 2:19 Jump 5: Voyager's light-day 3:06 Jump 6: The nearest star 3:45 Jump 7: The Milky Way 4:29 Jump 8: Andromeda 5:14 Jump 9: Superclusters and the cosmic web 5:58 Jump 10: The edge of what we can see 7:32 Beyond the edge 8:37 Back home Sources: NASA Science: Earth's Moon facts (distance ~384,400 km): https://science.nasa.gov/moon/facts/ NASA Science: Sun facts (8 min 20 s light time): https://science.nasa.gov/sun/facts/ NASA Science: Neptune facts (~30 AU, ~4 hours light time): https://science.nasa.gov/neptune/facts/ NASA Science: Voyager 1, what is a light-day (Nov 18, 2026; ~61,000 km/h): https://science.nasa.gov/mission/voyager/v... NASA Science: Where are Voyager 1 and 2 now?: https://science.nasa.gov/mission/voyager/w... NASA Science: Oort Cloud: https://science.nasa.gov/solar-system/oort... NASA Science: Hubble image of Proxima Centauri, nearest star at 4.2 light-years: https://science.nasa.gov/asset/hubble/hubb... NASA Science: Galaxies (Milky Way size, star count): https://science.nasa.gov/universe/galaxies/ NASA Science: Andromeda galaxy (~2.5 million light-years): https://science.nasa.gov/mission/hubble/sc... Tully et al. (2014), The Laniakea supercluster of galaxies, Nature 513, 71: https://www.nature.com/articles/nature13674 ESA: Planck and the cosmic microwave background: https://www.esa.int/Science_Exploration/Sp... NASA Science: Webb telescope, earliest galaxies: https://science.nasa.gov/mission/webb/ NASA Science: Dark energy: https://science.nasa.gov/dark-energy/ Scripts are AI-assisted and checked against the sources listed above. Narration and visuals are AI-generated; some visuals are artistic illustrations, not real photographs. #space #science #astronomy