1939: WOR Radio Attempts First Broadcast Signal to Mars | Historic Planetary Experiment

Complete recording of a remarkable WOR Radio special broadcast from 1939, documenting an ambitious scientific experiment that attempted to transmit a radio signal from Earth toward the planet Mars. Broadcast live from the Hayden Planetarium at the American Museum of Natural History in New York City and a receiving station at Baldwin, Long Island, the program follows astronomers and radio engineers as they take advantage of Mars' close approach to Earth in an effort to determine whether radio signals could travel through space, reach the Red Planet, and return as a detectable echo. Although the experiment did not receive a returning signal, the broadcast remains a fascinating example of early radio science, public education, and humanity's growing fascination with interplanetary communication. This recording is presented strictly as a historical document. 00:00 - Historical Context and Introduction 00:25 - WOR Radio Attempts First Broadcast Signal to Mars 01:20 - The Baldwin Receiving Station 02:19 - The Mars Experiment Begins 03:14 - Signal Transmission to Mars 03:47 - Signal Transmission and Anticipation 05:12 - Experiment Conclusion Highlights of this broadcast: Mars reaches a favorable position: • The program explains that Mars and Earth have moved into one of their closest approaches in years, creating an ideal opportunity for a unique radio experiment. Broadcast from the Hayden Planetarium: • The program opens from the Hayden Planetarium, where astronomers discuss the scientific importance of the experiment and the growing interest in radio communication beyond Earth. A historic radio experiment: • Working with engineers and astronomers, WOR attempts to transmit what is described as the first radio signal intentionally directed toward the planet Mars. The Baldwin receiving station: • Listeners are taken inside a major radio receiving facility on Long Island, where operators monitor numerous frequencies while waiting for the possible return of the transmitted signal. Radio waves and deep space: • The broadcast explains how radio waves travel at the speed of light and calculates the expected time required for a signal to reach Mars and return to Earth. Waiting for an echo: • After transmitting the signal, engineers and observers wait several minutes in anticipation of a possible reflection from the Martian surface. The experiment concludes: • No returning signal is detected, but the participants emphasize the scientific value of the attempt and the importance of continued research into long-distance radio communication. Historical significance: This broadcast reflects the growing optimism surrounding radio technology during the late 1930s. At the time, scientists were still learning about the behavior of radio waves in Earth's atmosphere and in space. Questions surrounding the Kennelly-Heaviside layer (now better understood as part of the ionosphere) made experiments like this valuable opportunities to test theories about long-distance radio propagation. While no signal was detected from Mars, the program remains an extraordinary document of early scientific broadcasting and public interest in astronomy decades before the beginning of the Space Age. Today, it stands as one of the earliest surviving radio broadcasts devoted to the possibility of communicating across interplanetary distances. If you enjoy authentic historical broadcasts and restored archival recordings, please consider subscribing for more rare radio programs from the twentieth century. #Mars #Astronomy #WORRadio #HistoricRadio #ScienceHistory #Planetarium #OldTimeRadio #SpaceHistory #RadioHistory #History