Evolution of Comet Holmes’ 2007 Apparition

Comet Holmes (17P/Holmes) livened up the fall and winter skies with a sudden outburst in 2007. Images credit and copyright by James Burnell with Tele Vue TV-NP127is telescope

It was ten years ago that comet Comet Holmes (17P/Holmes) livened up the fall and winter skies with a sudden outburst that brightened it from mag. 17 to above naked-eye mag. 2.8 on October 23/24, 2007. Its coma subsequently expanded to a diameter greater than that of the sun! Well placed in Perseus for northern hemisphere observers, it became an instant imaging target for amateur astronomers. Images often show it as a “ball’ because it was positioned such that from Earth, observers were looking straight down along the tail. Continue reading “Evolution of Comet Holmes’ 2007 Apparition”