WhyariumNo. 03
Catalogue of observations

Thirty stops on the way out

Forty-five powers of ten separate the smallest and the largest things on this list. Each mark on the rule below is one observation; every row opens its entry.

  1. 01 Quarkupper limit on size 1 am 10⁻¹⁸ m
  2. 02 Protondiameter 1.7 fm 10⁻¹⁵ m
  3. 03 Uranium nucleusdiameter 15 fm 10⁻¹⁴ m
  4. 04 Hydrogen atomdiameter (twice the Bohr radius) 106 pm 10⁻¹⁰ m
  5. 05 Water moleculeapproximate diameter 280 pm 10⁻¹⁰ m
  6. 06 DNA double helixwidth of the helix 2 nm 10⁻⁹ m
  7. 07 Influenza virusdiameter 100 nm 10⁻⁷ m
  8. 08 E. coli bacteriumlength 2 µm 10⁻⁶ m
  9. 09 Red blood celldiameter 7.5 µm 10⁻⁶ m
  10. 10 Human hairwidth 70 µm 10⁻⁵ m
  11. 11 Dust mitelength 300 µm 10⁻⁴ m
  12. 12 Grain of sanddiameter 1 mm 10⁻³ m
  13. 13 Antbody length 5 mm 10⁻³ m
  14. 14 Honeybeebody length (worker) 1.5 cm 10⁻² m
  15. 15 Youheight 1.7 m 10⁰ m
  16. 16 Blue whalelength 25 m 10¹ m
  17. 17 Eiffel Towerheight (with antennas) 330 m 10² m
  18. 18 Mount Everestheight above sea level 8.85 km 10³ m
  19. 19 The Moondiameter 3,475 km 10⁶ m
  20. 20 Earthmean diameter 12,742 km 10⁷ m
  21. 21 Jupiterequatorial diameter 139,820 km 10⁸ m
  22. 22 The Sundiameter 1,392,700 km 10⁹ m
  23. 23 Earth's orbitdiameter of the orbit 2 au 10¹¹ m
  24. 24 Orbit of Neptunediameter of the orbit 60.2 au 10¹² m
  25. 25 To Proxima Centauridistance from the Sun 4.25 light years 10¹⁶ m
  26. 26 Orion Nebuladiameter 24.3 light years 10¹⁷ m
  27. 27 Milky Waydiameter of the stellar disc 100,415 light years 10²⁰ m
  28. 28 Local Groupdiameter 10 million light years 10²² m
  29. 29 Laniakea Superclusterdiameter 518 million light years 10²⁴ m
  30. 30 Observable universediameter 93 billion light years 10²⁶ m