Go onboard Apollo 8 in 1968 as the "Earthrise" photograph was taken. The audio captures astronauts Bill Anders, Jim Lovell, and Frank Borman all working to capture the iconic view on camera. Andy Saunders, author of "Apollo Remastered" and "Gemini and Mercury Remastered," tells the stories behind some of NASA's historic photographs. Watch this Saturday at 5 PM ET on C-SPAN 2 American History TV. | American History TV

On November 28, 1967, astronomers found the first pulsar. Space History Archives👉 https://space-com.visitlink.me/xsOjwW A pulsar is a super-dense star that rotates super fast. As the pulsar spins, it emits two beams of light in opposite directions. When astronomers look at a pulsar, it looks like a star that's flickering on and off at a steady, constant pace. The first pulsar was observed by Jocelyn Bell Burnell and Antony Hewish. They were looking at the constellation Vulpecula when they saw a