6APR

Earth Vanishes From Sky for 40 Minutes

2 min read

14:21UTC

Between Earthset at 6:45 PM and Earthrise at 7:25 PM, four astronauts see something no living person has witnessed: Earth gone entirely.

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ScienceDeveloping

Key takeaway

For 40 minutes, four people had neither ground contact nor Earth in view.

Orion's crew observes Earthset at 6:45 PM EDT and Earthrise at 7:25 PM EDT on 6 April.⁠¹ Between those two moments, four crew members experience something no living person has witnessed: Earth gone from the sky entirely. The 40-minute window coincided with the communications blackout, meaning the crew had neither ground contact nor a view of home simultaneously.

Apollo 8 astronauts famously photographed Earthrise from lunar orbit in December 1968, producing one of the most reproduced images in history. But Apollo crews always had Earth in view from at least one window during their far-side passes; the geometry of Artemis II's flyby trajectory, at 4,070 miles altitude rather than Apollo's 70-mile orbit, places the spacecraft at an angle where the lunar disk fully occults the home planet.

Deep Analysis

In plain English

As Orion swung behind the Moon, Earth gradually descended below the lunar horizon from the crew's perspective. This is called Earthset, the equivalent of sunset but for your home planet. Between 6:45 PM and 7:25 PM EDT, Earth was completely hidden behind the Moon's bulk. The crew could look out any window and see only the Moon, deep space, and stars. No communications. No view of home. This was not a sensor reading or a calculation: they physically could not see Earth. At 7:25 PM, Earthrise: Earth came back up above the lunar horizon. The crew's 40-minute window of total isolation ended.

What could happen next?

Precedent
The Earthset-to-Earthrise window is the first controlled observation of total Earth occlusion from beyond the Moon, producing psychological and physiological data relevant to multi-year deep-space mission design.

Primary parallel: Apollo 8 astronaut Bill Anders photographed Earthrise in December 1968, producing one of the most reproduced images of the 20th century and triggering a wave of environmental awareness. That image was taken from 70-mile lunar orbit, with Earth clearly visible. The Artemis II crew experienced the inverse: Earthset, then 40 minutes without Earth in any window, then Earthrise.

Counter-parallel: Apollo 11's Command Module pilot Michael Collins orbited the Moon alone for 28 hours while Armstrong and Aldrin landed, spending time behind the Moon in full blackout repeatedly. Collins has described the period as unexpectedly peaceful rather than isolating. His experience is the closest historical parallel, though he was orbiting rather than on a flyby arc.

Consensus view: University College London's Division of Psychology and Language Sciences research on overview effects in spaceflight suggests that losing Earth from direct view, rather than merely shrinking it, creates a qualitatively different cognitive experience that no simulation or training can fully replicate. The Earthset-to-Earthrise window is of significant interest to space psychology researchers.

Counter-view: European Space Agency astronaut training division psychologists, drawing on ISS cupola window research, have noted that the overview effect varies substantially by individual. Some crew members report that Earth disappearing from view intensifies the experience; others report feeling relief from the constant reminder of home. Pre-flight self-reporting does not predict individual response.

Key tension: Whether data collected by the ARCHeR wristbands during the Earthset-to-Earthrise window captures physiological correlates of the psychological experience, which would constitute the first objective measurement of the overview effect's absence phase.

Mentions:Orion →Artemis II →ARCHeR →Apollo 8 →Earthset →Earthrise →European Space Agency →Apollo 17 →Jeremy Hansen →Reid Wiseman →University College London →

First Reported In

Update #5 · Records fall while Orion goes silent

· 6 Apr 2026

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Different Perspectives

Boeing / Northrop Grumman

SLS component production spans more than 40 US states, giving the industrial base strong political protection regardless of commercial alternatives. Congressional mandates guarantee contracts through FY2029, insulating the supply chain from technical programme changes.

NASA Office of Inspector General

The IRB heat shield findings should have been published before launch. The Starship HLS is two years behind schedule with a worsening manual control dispute. NASA has no crew rescue capability for lunar surface operations. The programme is proceeding with documented, unresolved risks.

JAXA

JAXA is an Artemis Accords signatory with the Lunar Cruiser rover planned for south-pole surface operations; Chang'e 7's first-arrival timeline compresses the window those surface systems were designed to operate in alongside American crew.

Space Research Institute RAS / Roscosmos

The LILEM instrument on Chang'e 7 gives Russia science-cooperation presence at Shackleton's rim with no independent crewed lunar capability on a public timeline. This is Roscosmos's only confirmed path to south-pole science in the current decade.

CNSA / China Manned Space Agency

Chang'e 7 at Wenchang confirmed a second-half 2026 launch for Shackleton rim, 18 to 24 months before any American crewed arrival. The mission carries a Russian LILEM instrument, giving Roscosmos a south-pole science foothold inside China's programme.

Jeremy Hansen / Canadian Space Agency

Hansen appeared at the 16 April JSC press conference in his only public moment since splashdown. Canada's Canadarm3 remains without a confirmed deployment host after Gateway cancellation, with CSA maintaining institutional silence on the programme's status.