The Nov. 1 photo at left, by an amateur astronomer, shows Comet Holmes' coma consists of concentric shells of dust and a faint tail. The Hubble image at right, made Nov. 4 and enhanced to reveal details, reveals the bow-tie appearance created by twice as much dust existing along the horizontal direction. Credit: NASA,ESA, and H. Weaver (The Johns Hopkins University Applied Physics Laboratory); Alan Dyer
