Quick question:
Can one have different wallpaper for each page?
Nope you can only set for the lock screen and the home screen.
It's a long night exposure where the moon is lighting up the mountains in the distance. I shot it on an 8x10 camera, so the quality is really beautiful and you can see star trails going through the sky.
They're not shooting stars. The streaks are caused by a combination of a long exposure time and the rotation of the Earth. As the camera's shutter stays open, the stars "move" across the sky, causing the streaks. It's quite beautiful, actually.