On a clear September night in 1971, I set up my telescope in anticipation of an hour or two of double-star observing from my home in Massachusetts. I had notched two pairs and was working on a third when the view in my eyepiece seemed to fog over. Glancing upward, I noticed a bright glow covering the northern sky. What happened next I described in my logbook entry for that evening:Astronomy magazine subscribers can read the full column for free. Just make sure you're registered with the website.