If you look at the top-right corner, you can see a solid band that arcs around to the centre of the image, which pretty much says that the image has been manipulated.
Shame if I'm right, 'cos I thought it was a helluva pic when I first saw it. But the solid band gives it away! Almost a very good piece of digital manipulation and, even if it is fake, it still looks great.
God I'm dull for noticing that - must leave the house more...