On June 10, 2023, a CubeSat (miniature satellite) that contains a nanobook with messages from Pope Francis will be launched from Vandenberg Space Force Base in California. The pope’s messages will be transmitted on 427.5 MHz in English, Italian, and Spanish and can be heard on any amateur radio receiver. The new space mission, called Spei Satelles (which can be translated to mean guardian of hope), is promoted by the Dicastery for Communication and coordinated by the Italian Space Agency. The project was unveiled at the Vatican on March 27, 2023, which was the anniversary of the prayer service that Pope Francis led in an empty St. Peter’s Square during the midst of the COVID-19 pandemic in 2020. The message on the nanobook is from that event. The nanobook was created by the National Research Council (CNR) of Italy. “The lab converted the 150-page book — about 86 square feet of printed material — into binary code that fits on a tiny chip,” said Andrea Notargiacomo, head researcher in nanotechnology at CNR. The 2 × 2-millimeter chip is about the size of the tip of a crayon. Two dozen students at the Polytechnic University of Turin built the miniature satellite.