Originally posted by humy
There is a picture at the top of this link that I query:
If you look at it, the night sky appears to glow rather green in places especially on the right hand side just above the horizon. Is that just false color? If not, where does that green light come from? Is it light pollution? -seems a bit odd ...[text shortened]... Or does parts of the Milky way as we see it in the sky sometimes look greenish and, if so, why?
That light is most certainly coming from the ground, most likely a city of some size a distance away. There are also green tinted lights seen right in the middle of the telescopes themselves so the coloring could have come from the photo technique or post production hue and saturation adjustments. I do that a lot with my own photo's.
Eastern Australia is a bit too close to the equator for my first thought: Distant Aurora Borealis.
Maybe Aurora Australis:
Definite green there. But could you see them from the site of that telescope? I don't have a clue about that one. You might be able to rule that out by the direction the optical scope was aimed. Don't think you would see southern lights if you were pointing your scope due north.
The image doesn't say anything about what direction the camera was recording.
A bit of googling, I see that scope, the 'compact array of Australia' is around 30 degrees south, so it all but rules out southern lights but not totally. If those southern lights had been visible, I would have thought the authors would have mentioned it in the article.
So most likely, a town and the photo was tinkered with.