Dustin Lang arrived for a few days of hacking in preparation for (we hope) putting in a NIPS paper by the deadline of next week. We are working with Schölkopf on a project to combine arbitrarily badly processed human-viewable images to find very faint features in extended astronomical objects (like galaxies and nebulae). We argued for ages about the methodology and started to implement. In the background, while Lang and I pair-coded something somewhat sensible, Schölkopf coded up the straight-up average of the registered images. It looked surprisingly good, causing us to wonder whether it is worth going to all the trouble to which we are going!