"From the Northern to the Southern Cross"
This is a picture of our own Milky Way Galaxy, which was taken just after sunset in October, in Laguna Cejar in Salar de Atacama of Northern Chile. This picture encompasses many aspects of the sky, such as Venus, the Moon, Saturn, and Mercury, all in that order beneath the Milky Way arch. On the bottom left, there is airglow, which is "light emitted by atoms high in the Earth's atmosphere as they recombine at night after being separated during the day by energetic sunlight." On the horizon you can also see the lights of many distant small towns. The most prominent question this photo raises for me is: what makes the sky turn this color?
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