From an Atom to 92 Billion Light-Years | Universe Size Comparison

How small is an atom — and how big is the observable Universe? Travel through 64 scales in a continuous size comparison, from a hydrogen atom to a region roughly 92 billion light-years across. Watch cells become tiny beside everyday objects, planets shrink next to stars, and entire galaxies disappear into the scale of the observable Universe. A continuous camera move connects every step in this 24-minute journey, presented in 4K at 60 FPS. CHAPTERS 00:00 Atoms & molecular machines 01:59 Living cells 03:33 Everyday objects 05:05 Instruments of discovery 06:33 Engineering giants 08:51 Small worlds 11:29 Icy moons & dwarf planets 13:36 Rocky worlds & giant moons 15:19 Giant planets 16:29 Stars & a supergiant 18:39 The outer Solar System 19:40 Clouds between the stars 21:12 Galaxies 22:39 Our cosmic neighbourhood 23:50 The observable Universe ABOUT THE SIZES Objects on screen share one linear scale. Labels identify the dimension being compared: diameter, width, length, height or regional extent. Natural sizes may vary, and the boundaries of nebulae, galaxies and other large regions depend on how they are measured. The final scale is the OBSERVABLE Universe, not the whole Universe. The total size of the Universe is unknown. Surface details, colours and object spacing are illustrative; this is an animated size comparison, not a physical simulation. SELECTED REFERENCES Planet sizes — NASA JPL: https://ssd.jpl.nasa.gov/planets/phys_par.html Moon sizes — NASA JPL: https://ssd.jpl.nasa.gov/sats/phys_par/ The observable Universe — NASA: https://www.nasa.gov/science-research/astrophysics/how-big-is-space-we-asked-a-nasa-expert-episode-61/ Which change in scale surprised you the most? The track "Big Rock - Take the Lead" (artist: Kevin MacLeod) is licensed under the Creative Commons Attribution 4.0 license. https://creativecommons.org/licenses/by/4.0/ #SizeComparison #Universe #Space