There's more than meets the eye.

Nikkon Company which has been producing cameras and other optic equipment for nearly a century, has made available online a Universcale. This allows viewers to explore comparative sizes of categories of all known entities.

There is only a particular range of objects the size of which human beings can perceive. Beyond that spectrum, the cosmos contains a colossal variety of other things outside of our bare physical vision. Calibrated scientific instruments have become so accurate that many of these invisible phenomena can now be transformed into images that can be studied and measured along a grand scale.

This is what Nikkon's Universcale aims to present where users can navigate through the different images and their corresponding sizes to experience the differences themselves - http://www.nikon.com/about/feelnikon/universcale/