Artemis II 40-Minute Communication Blackout: Crew Emerges

Published: 6 April 2026 . The English Chronicle Desk. The English Chronicle Online—Tracking the return of humanity to the deep-space frontier.

At approximately 7:42 PM EDT tonight, a crackle of static over the Deep Space Network (DSN) signaled the end of the most intense 40 minutes of the Artemis II mission. For the first time in 54 years, four human beings have traversed the “Silence of the Far Side”—the period when the bulk of the Moon physically blocks all radio, laser, and telemetry signals between the Orion spacecraft and Earth. While planned and expected, the blackout remains the ultimate test of both the spacecraft’s autonomous systems and the psychological resilience of the crew.

The loss of signal (LOS) occurred at 5:47 PM EDT as Orion, traveling at over 5,000 mph, dipped behind the lunar limb.

The “Blackout” Mechanism: Because electromagnetic waves cannot pass through the Moon’s 2,159-mile diameter, the spacecraft entered a cone of total electromagnetic shadow. During this window, no voice from Houston could reach the crew, and no data from the ship’s vitals could reach Mission Control.
Autonomous Command: During the silence, Orion’s onboard computers took full control. The European Service Module (ESM) performed a series of micro-adjustments to the spacecraft’s attitude, ensuring the main windows remained oriented toward the lunar surface for the crew’s scientific observations.
The “Goonhilly” Watch: At the Goonhilly Earth Station in Cornwall, engineers monitored the exact millisecond the signal vanished. “It’s a moment of profound breath-holding,” said Matt Cosby, Goonhilly’s CTO. “Even when you know the physics will bring them back, the silence of a crewed ship is a heavy thing.”

While the world waited for the signal to return, the four astronauts—Reid Wiseman, Victor Glover, Christina Koch, and Jeremy Hansen—were witnessing a landscape that remains one of the most exclusive views in the universe.

The Orientale Basin: The crew passed over the edge of the Orientale Basin, a massive “bullseye” impact crater that is largely invisible from Earth.
Shadow and Relief: Because the Sun was positioned to the side of their trajectory, the crew reported seeing “stretching shadows” that revealed deep ridges and slopes on the far side that were obscured during the Apollo missions.
The “Space Selfie”: NASA confirmed that during the blackout, the crew utilized an automated camera arm to capture high-definition imagery of the spacecraft against the backdrop of the lunar far side—the first “human-perspective” photos of this region in over half a century.

The tension in Houston broke at 6:27 PM EDT with the Acquisition of Signal (AOS). As Orion rounded the lunar limb and the Earth “rose” over the horizon, the first telemetry packets confirmed that all life-support systems were nominal.

“Houston, Integrity is back. The view was… well, we’re going to need a bigger dictionary,” radioed Commander Reid Wiseman.

The successful flyby and the restoration of contact mark the completion of the mission’s primary objective. Artemis II is now officially “homeward bound,” utilizing the Moon’s gravity to slingshot back toward Earth. The crew will spend the next four days conducting deep-space evaluations and a “cosmic chitchat” with the International Space Station before their scheduled splashdown in the Pacific on Friday, 10 April.

Artemis II: Far Side Communication Log (6 April 2026)

Phase	Time (EDT)	Duration	Status
Loss of Signal (LOS)	5:47 PM	—	Start of Blackout
Closest Approach	7:02 PM	—	~4,070 Miles from Surface
Acquisition of Signal (AOS)	6:27 PM	40 Minutes	Contact Re-established
Total Lunar Flyby Window	2:45 PM – 9:40 PM	6 Hours, 55 Min	Scientific Observation Active