How Big Is the Universe, Really?

How big is the universe, really? We start at home and zoom out, step by step: the Moon, the Sun, the planets, Voyager 1 (about to become the first spacecraft one light-day from Earth), the nearest star, the Milky Way, Andromeda, the cosmic web, and finally the edge of the observable universe, 93 billion light-years across. Along the way we shrink Earth to a marble and the Milky Way to a coin, so the numbers finally make sense. 0:00 How big is the universe? 0:27 Home: Earth and the Moon 1:24 The Solar System, shrunk 2:40 The edge of the Solar System 3:31 The nearest star 4:23 How do we even know? 5:16 The Milky Way 6:52 Galaxies everywhere 8:02 The cosmic web 9:10 The observable universe 10:55 What's beyond the edge? 11:38 Zooming back in Sources: NASA (Voyager, Oort Cloud), EarthSky (Voyager 1 one light-day, Nov 18 2026), ESA/Webb (Webb's First Deep Field), Nature 2014 / Space.com (Laniakea), Wikipedia "Observable universe" (size, age, number of galaxies). Music: original Brainy Planet track. Where did you feel the smallest? Tell us in the comments! #universe #space #astronomy #science