•A post about Artemis II's Orion astronauts being the most isolated humans during the Moon's far-side blackout, noting Apollo 10 in 1969 and Apollo 13 in 1970 had crews experience the exact same communications isolation on lunar flybys.
•The post attributes the historical amnesia to modern journalists born after Y2K who may overlook NASA's Apollo-era achievements, despite Artemis II being the first crewed lunar mission since 1972.
•During far-side passages, the Moon blocks radio signals to Earth for roughly 45 minutes, a standard occurrence in both Apollo lunar missions and the ongoing Artemis II trajectory launched April 1, 2026.
Compare Apollo 10 isolation details
Evolution of lunar comms tech
Compare Apollo 10 isolation details
Here's a detailed comparison of the communications isolation (radio blackout) experienced by the Apollo 10 crew during their lunar operations, focusing on the far-side passages behind the Moon. This directly addresses the context from the original post about Artemis II's planned blackout and claims of historical "firsts" in isolation.Key Context on Far-Side
BlackoutsRadio signals cannot bend around the Moon, so any spacecraft passing behind the far side loses all direct line-of-sight communication with Earth. This is a purely physical phenomenon—no conspiracy or anomaly involved. The duration depends on the spacecraft's trajectory, altitude, and speed relative to the Moon.
•Typical duration in Apollo lunar orbits: Approximately 45 minutes per orbit (or per far-side pass). The crew relied entirely on onboard systems, pre-planned procedures, and each other. No real-time voice, telemetry, or commands from Mission Control.
youtube.comThis happened multiple times during missions that entered lunar orbit.Apollo 10 Isolation Details (May 1969)Apollo 10 was a full "dress rehearsal" for Apollo 11. It included:
•Crew: Thomas Stafford (commander), John Young (CM pilot), Eugene Cernan (LM pilot).
•The Command/Service Module (CSM) entered lunar orbit on May 21, 1969.
•They spent about 61 hours and 37 minutes in lunar orbit, completing roughly 31 orbits.
en.wikipedia.orgFar-side blackout specifics:
•Occurred on every orbit while behind the Moon.
•Duration: ~45 minutes per pass (standard for low lunar orbits at ~60–70 nautical miles altitude).
•The crew performed critical tasks during these periods, including landmark tracking, photography, and (for Stafford and Cernan in the Lunar Module) a descent rehearsal down to ~8–10 miles above the surface.
•Famous anecdote: During one far-side pass, the crew heard unexplained "whistling" or "space music" sounds (later identified as radio interference between the CSM and LM VHF systems when the vehicles were separated). This occurred while completely isolated from Earth.
Total far-side isolation time: With ~31 orbits, the crew collectively experienced many hours of blackout periods (roughly 45 min × number of far-side passes). John Young, alone in the CSM during LM operations, spent significant solo time in these windows.
•Additional notes: The crew also conducted a Trans-Earth Injection (TEI) burn while behind the Moon (out of contact), then faced the standard ~3-minute re-entry plasma blackout on return to Earth.
Apollo 10 demonstrated that humans and spacecraft could operate autonomously during these blackouts without issue.Comparison to Apollo 13 (1970)Apollo 13 used a free-return trajectory (similar to Artemis II) after the oxygen tank explosion forced an abort. They did not enter lunar orbit but performed a lunar flyby/slingshot.
•Far-side blackout: One primary pass behind the Moon, lasting ~45 minutes (or up to ~half an hour in some accounts, depending on exact trajectory).
brainly.comThe crew (Lovell, Swigert, Haise) was farther from the lunar surface than orbital missions (~100 km/60 mi farther at closest approach) due to the emergency path, but the blackout duration remained comparable.
•They managed critical systems (power conservation, course corrections) during isolation.
•Re-entry had its own separate ~6-minute blackout (longer than the usual ~3–4 minutes due to a shallower entry angle), but that's atmospheric plasma, not lunar far-side related.
Comparison to Artemis II (Ongoing 2026 Mission)Artemis II (launched April 1, 2026) is a crewed test of Orion on a free-return lunar flyby (no lunar orbit insertion). Four astronauts: Reid Wiseman, Victor Glover, Christina Koch, Jeremy Hansen.
•Far-side blackout: One main planned passage behind the Moon, lasting ~41–45 minutes (NASA cites ~41 minutes; some reports round to 45 including margins for signal acquisition).
reddit.comTrajectory: Higher-altitude flyby (thousands of miles from the lunar surface vs. Apollo's ~60–70 miles in orbit). This gives unique views of more of the far side but doesn't significantly change blackout physics.
•Isolation: Similar experience—complete loss of contact with Earth, reliance on onboard autonomy. Orion will record data and handle contingencies independently.
•Difference in "isolation intensity": Artemis II crew will be the farthest humans from Earth in history during parts of the trajectory (potentially breaking Apollo 13's record), and it's the first crewed lunar mission since 1972. However, the blackout mechanism and duration are nearly identical to Apollo-era far-side passes.
Summary Table of Far-Side Isolation
AspectApollo 10Apollo 13Artemis II (2026)
TrajectoryLunar orbit (~31 orbits)Free-return lunar flybyFree-return lunar flyby
Blackout per pass~45 minutes~45 minutes (one main pass)~41–45 minutes (one main pass)
Number of passesMultiple (dozens of far-side arcs)1 primary1 primary
Altitude at MoonLow (~60–70 nmi orbital)Higher flybyHigh flyby (3,000–9,000 miles)
Total blackout timeMany hours across mission~45 minutes~41–45 minutes
Notable activitiesLM descent rehearsal, photography, "space music" incidentEmergency systems managementSystem tests, far-side photography
Crew experienceRoutine for the era; demonstrated autonomyHigh-stakes abort scenarioFirst in 50 years; deeper space record potential
Bottom line: Apollo 10 (and other orbital missions like Apollo 8, 11, etc.) experienced the exact same type of far-side communications isolation—repeatedly and for comparable durations—as what Artemis II will encounter once. The original post's claim of Artemis II astronauts being "the most isolated" overlooks these precedents. The ~45-minute blackout is standard physics for any lunar far-side passage, whether in orbit or on a flyby. Apollo crews handled it with 1960s technology; Artemis II tests modern systems in a similar environment.
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