I thought it would be appropriate to post this video that was originally posted at on Feb 18, 2011NanoSail-D
"High overhead, out of the darkness, a bright light surges into view. For 5 to 10 seconds it outshines the brightest stars in the sky, mimicking a supernova, perhaps even casting faint shadows at your feet. The silence is broken by your own excited shouts. Could this happen to you? It could, if you happen to be outside when NanoSail-D flies by."
Visit http://science.nasa.gov/science-news/science-at-nasa/2011/01feb_solarsailflares/ for more information.
You can find more information on flybys at http://spaceweather.com/flybys/