During the Apollo and Gemini missions, several astronauts reported unusual phenomena that still get discussed today in UFO research circles. Some examples that are often mentioned: • Apollo 10 (1969) – astronauts reported hearing a strange whistling or "space music" while on the far side of the Moon, where radio contact with Earth was impossible. NASA later suggested VHF radio interference as the explanation. • Gemini IV (1965) – astronaut James McDivitt reported seeing an unidentified object with what he described as "arm-like structures." • Apollo 8 (1968) – the famous "Santa Claus" transmission, often debated whether it was a joke about seeing unidentified objects or simply referring to Christmas. • Alfred Worden (Apollo 15) later described the psychological isolation of being the most isolated human while orbiting the Moon alone. There are also more controversial claims from people like Karl Wolfe, Ken Johnston, and Donna Hare alleging unusual structures in lunar imagery, though these claims remain unverified and disputed. Obviously many of these have conventional explanations, but I find it interesting how often unidentified observations appear in early spaceflight history. I recently compiled a documentary-style breakdown of these incidents and the possible explanations (both skeptical and speculative) if anyone wants a structured overview: submitted by /u/No_Money_9404 [link] [comments]