This is rather glorious. Kottke writes,

Sales Wick is a pilot for SWISS and while working an overnight flight from Zurich to Sao Paulo, he filmed the first segment of the flight from basically the dashboard of the plane and made a timelapse video out of it. At that altitude, without a lot of light and atmospheric interference, the Milky Way is super vivid.

Make sure to stick around at least til the ~1:25 mark when other aircraft begin zooming past.