From time immemorial, humans have been fascinated by the stars. With the advent of a “blue moon” in July, my Facebook news feed was inundated with astrological speculation. Also popular were stories on the topography of Pluto, given the success of the New Horizons mission. And of course, the world is still reeling from the fact that scientists were able to land a probe on a speeding comet. The study of phenomena in this wide