Few years back, I thought that it's possible. Later when I started to learn about image manipulation and the tricks involved to taking photographs, I thought it's not possible. But later I started to think it's pretty much possible and I started seeing images which are very much convincing enough that my thought is right...
This is one among them...
1IMG_3160 SUN AFTER SUNRISE | Flickr - Photo Sharing!
Check his others works too...