Comet 17/P Holmes
... surprised astronomers around the world with a spectacular eruption. On October 23 it brightend almost a millionfold from mag 17 to mag 2.5 in just a few hours. The above image was taken on October 31 at Guidestar Observatory through the 14 inch telescope. It shows the inner green coma 17P Holmes Larsen-Sekanina filter and some dark structures near the nucleus. A Larson-Sekanina filter was applied to the luminance channel to bring out the streamers and subtle jets (click on image to enlarge).