IconVault's Scale of Universe is an interactive logarithmic scale explorer that takes you from the tiniest particles to the largest structures we know. Zoom through quarks, protons, atoms, cells, humans, mountains, planets, stars, galaxies and finally the observable universe, with each object placed at its real size on the scale. It is the classic powers of ten journey made interactive.

Everything runs 100% in your browser and it is completely free with no signup. Sizes are rounded, educational estimates rather than survey-grade measurements, and the observable universe figure reflects current cosmology. Perfect for classrooms, curious minds and anyone who has wondered exactly how small an atom is or how big a galaxy is.