1)
2) http://universe-beauty.com/albums/hubble/shadow-opportunity-big.jpg
I think this is just a site that has nice space wallpapers. High performance photo gallery.
3) Large Photo
4) This photo appears to be from a rover of some sort-on mars or the moon or something, I’m not sure. For one, the shadow makes the rover look huge, I think it looks like the shadow of a massive robot on the landscape. Then the strange way the light strikes the mountain range in the back makes you unsure how big they are. The perspective and odd shadows of the photo could be shifting them to look massive when in reality they could be small. The whole photo appears to have a strange distorted size feature about it.
Opposite to large is this cool photo style, called tilt shift
