حجم الارض بالنسبه للكون..!!!

[الذهبي]

http://www.youtube.com/watch?v=O4_9n5xtItc

http://www.youtube.com/watch?v=SBjrOEdXsyA&feature=related

http://www.youtube.com/watch?v=NUQfkG0ouoE&NR=1
http://www.youtube.com/watch?v=UEwAJ7wqy8c&feature=related