a video about dark matter and how a map of it in the universe was made.....
it's very interesting...
http://youtube.com/watch?v=gCgTJ6ID6ZA
videos to understand the vast distance of the universe
http://youtube.com/watch?v=Zr7wNQw12l8&feature=related
this video only show 100 million light years away that is a fraction of the size of the universe......
http://www.youtube.com/watch?v=9BjHv...eature=related
http://youtube.com/watch?v=W35SYkfdGtw&feature=related