Michael Allison (NASA/GISS and Columbia University)

The Celestial Cartography of Grand Central Terminal’s Sky Ceiling – A Meeting of Classical Astronomy and the Beaux Arts

The origin of the famously noted reversal of the constellations depicted on the great ceiling of Grand Central Terminal’s main concourse remains a matter of some confusion and debate. The quoted statement of a once famous Columbia University astronomer and design consultant, Professor Harold Jacoby, shortly after the opening of the terminal in 1913, attributed the execution to a mistakenly reversed transfer of a printed plan. But according to a 1946 authority on the train station, David Marshall, the reversal was instead based on a medieval map selected by the ceiling’s artistic designer, the Parisian portrait painter Paul Helleu. Although no firsthand accounts of the design are available, many specific features of the depicted constellations and their longitudinal arrangement, along with the rendered lines of the celestial equator and ecliptic, point to the likely source of the original plan. Contrary to the facile view that Grand Central’s sky ceiling is “only a decoration,” several mathematically patterned features of the spare and admittedly highly stylized design suggest that this was a happy marriage of astronomy and art. However quaintly considered, the controversy surrounding the world’s physically largest star map has several counterparts in the planetographic and astrometric conventions used in astronomy and space navigation today.