One of the pleasures of attending American Astronomical Society meetings is strolling through a sea of poster papers. A poster paper is exactly what it sounds like — it’s an oversized page that summarizes the results of a single study. Now and then, you spot displays where the science comes mixed with whimsy. Such is the case with “Discovery and Interpretation of an X-ray Period in the Galactic Center Source CXOGC J174536–2856,” a study led by Valerie...