One of the cool iphone apps I use for astronomy is Starmap Pro which includes a great “find comets” feature. Ironically, the brightest one coming up was also the very same one that was mentioned recently in Astronomy magazine as “passing near M15″ and was pretty bright – magnitude 8!

M15 and Comet Garradd

Processing comet images can be a challenge. In particular, comets move fast! Well, they move fast with respect to the background stars. This creates challenges for “stacking” images More >