Scale of the Universe [1] – Once it loads, move the tool bar at the bottom right and left. Click on anything to read about it. There's a lot to explore.
http://standeyo.com/
Share [2]
Links:
[1] http://htwins.net/scale2/?bordercolor=white
[2] http://www.addthis.com/bookmark.php?v=250&username=questministries