Real Apollo 15 NASA Space Radio - Tape 551 - Sleep Ambience

Nasa Apollo 15 Space mission Tape 551 Mission Elapsed Time ~37 to ~49 hours — squarely Day 3 of Apollo 15 (launch was July 26, 1971), during the translunar coast — the ~3-day cruise out to the Moon, well before Lunar Orbit Insertion (~78 hrs) or the landing (Day 4-5). This is deep in the translunar coast — the ~3-day cruise out to the Moon, well before lunar orbit insertion (~78 hrs) or the landing. Per the Apollo Flight Journal's corrected transcripts for this window, expect: Routine hourly Mission Control status reports (distance from Earth, velocity, spacecraft systems) Crew sleep/rest period commentary (they were on a 9-hour rest cycle) Flight controller shift changes The start of a light-flash experiment (Scott describing seeing flashes of light — cosmic ray phenomenon) around 51:37–52:34 GET, which lands right at the tail end of/just after this block General "nothing dramatic happening" filler — no EVA, no landing, no major burn in this exact window