An aurora seen in northern Canada as captured on video in real time. That is, this is not time-lapse, it's actually what auroras look like. I saw similar ones when I was stationed in Iceland.
Technically, of course, "aurora" is Latin for dawn. This phenomenon is more precisely an aurora borealis, a "dawn of the north." Curiously, the sun can rise very nearly due north some days of the year as seen regions north of the arctic (or south of the antarctic) circle, so there can be a "northern (or southern) dawn" for real.