Original vintage print from Larousse Encyclopedia of Astronomy (c. 1959). Fig. 697 — 'Stellar Resolution of the Central Region of M33.' Spectacular near-full-page close-up photograph of the Triangulum Galaxy's core resolved into individual stars. Photo by Ritchey at Mount Wilson Observatory, 60-inch telescope, 8 hour 30 minute exposure spread over 3 nights, 1910. A landmark image in the history of extragalactic astronomy. Approx. 9.5 x 12.5 in. Ships flat with cardboard backing.