Those dang sodium vapour lights! The bane of my life those things..
Great photo though, must have been very high ISO judging by the lack of trails? As Fourwinds said, you can try 'tungsten' white balance to get a more natural looking effect but I've never been able to find a white balance setting (even in manual white balance) that gives both a natural sky and landscape when sodium vapour lights are used. Some historic buildings are lit by tungsten which is much easier to work with. Remote places under pure moonlight are just magic though.
Would love to be able to just pop out and photograph Avebury at night! It still gives me the goolies looking at night photos of the place though because of that 'Children of the Stones' TV series!
Orion looks great, keep up the good work :)