Full Resolution And there's the beautiful southern sky! The Milky Way is running top-to-bottom, and the two clouds to the left are, appropriately, the Small and Large Magellanic clouds. The faint green banding is real: that's airglow of oxygen at 557 nm -- in a way, a very low-level aurora generated in the Earth's upper atmosphere. The glow silhouetting the mountain is from another city maybe 15 km to the south.
