My Universe :: Interactive Simulation
This program simulates the search for a special type of supernovae explosion and measurs their brightnesses and redshifts to determine the content of Universe. more..

The Island Universes :: Animation
YouTube / Small / Medium/ Large / iPod / DVD
Immanuel Kant's "Island Universes" hypothesis states that stars do not fill outer space in some random manner, but rather that they are organized in huge clouds, .. more..

The Cepheids :: Animation
YouTube / Small / Medium/ Large / iPod / DVD
Henrietta Leavitt discovered the relation between the period and luminosity of cepheid variable stars. By using this relation, astronomers can estimate ..more..

Structure of the Universe:: Animation
Edwin Hubble explains how he determined the distances to several galaxies, found their sizes, and thus uncovered the structure of the universe.. more..

Time Dilation :: Game
One of Albert Einstein's greatest insights was realizing that ticking of the time is relative: your time does not tick as fast as mine if you move with respect to me. more..