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Auckland, New Zealand
A couple of days ago we were hanging out in our room when, like turning on the light, the whole room was bathed in a very bright orange glow. Either we had just been tango'd, or there was a mean sunset to check out from the bathroom window. The red and orange colours are caused by Rayleigh scattering, the same mechanism that causes the sky to be blue. As light travels through the atmosphere, some of it is scattered at large angles by small particles. This type of...