Today is National Moon Day, commemorating the day in 1969 that Neil Armstrong was the first person to set foot on the moon. Eleven other astronauts have gone on to follow in his bootsteps, including Commander David Scott and Lunar Module Pilot James Irwin, who took these historic photos during the Apollo 15 moon mission in 1971. We’ve stitched together their images to create this composite panorama of the landing site, where they spent three days conducting research. (If only they had selfie sticks back then.) Look for the ‘play’ button on our homepage to hear actual transmissions between the crew and the Mission Control Center in Houston.