One of our daily internet rituals (one that accompanies our regular checks of facebook, news sites, twitter, google reader… the list goes on) is a visit to NASA’s Astronomy Picture of the Day. One of the simplest websites we’ve ever come across, it presents a single new picture of the universe and brief explanation of the picture each day. It has no home page and does not have a particularly handsome design. Yet, unusually for the world wide web, it manages to create a moment of space and perspective each day. A chance to sit and wonder at, to learn about the world (and beyond) without leaving your desk…