posted by John Goss
on Wed Apr 22, 2009 05:17 pm MDT
Four hundred years ago, Galileo Galilei was the first person in history who turned a telescope to the heavens. What he saw forever changed our concept of the universe. Before that event, all astronomical knowledge was gained through naked-eye observations. After that, our understanding of the universe grew dramatically, and telescopes became larger and more powerful, eventually giving us the spectacular views that we see today.