Nikon Universcale

Universcale is a captivating Flash site done by Nikon to illustrate the extremes to which we can see using microscopes and telescopes.  The scale shows silhouettes of objects that are measured using common units, such as meter, kilometer and light year.  It captures measurements from the Extremities of Space (a hundred billion light years) down to the Great Primordial (one quadrillionth of a meter).  If you click on an object it gives you information about that object and shows it next to something that is comparatively small and something which is comparatively large.  This is a really fascinating way of experiencing size and the meaning of measurements.