Aurorae Out an Airplane Window

It's fun to look out an airplane window at night and try to identify stars above and cities below. But I've never had as good a view as this: That time-lapse video is by Paul Williams, a systems designer based in London. He flies to San Francisco many times a year, and the shortest route takes him over northern Canada (it may not seem like it should at first, but check out the geometry of great circles; this may help too). Armed with a Canon 6D and a small, flexible tripod he can attach to his b...