Magic Box => Physical Lab => Scale of the Universe I
about "Scale of the Universe I" : Move the slider above to zoom in or out. From the smallest possible unit of distance (known as the Planck Length) to the other reaches of space and the universe and everything in between. This amazing tool gives you a small idea of the incredible scale of the universe. Fascinating for any biologist, chemist, physicist, astronomer, cosmologist, science student or simply anyone who marvels at our insignificance in the grand scale of things.