Cool applet: Scale of Universe, from Planck Length to YoctoMeter to YottaMeter (.swf applet by Primax Studio).
Quantum foam, Size of Planck Length
Size of Universe
Planck Length = 1E-35 m
YoctoMeter = 1E-24 m
YottaMeter = 1E+24 m
Size of Universe = 900 YottaMeter (estimated)
Tag: scale of universe, what is planck length, what is yoctometer, what is yottameter, what is the size of universe, visualize size of universe, view size of universe, visualize quantum foam