Artemis II Crew Returns Safely After Historic Moon Mission

NASA's six-minute communication blackout during spacecraft reentry explained

Apr. 11, 2026 at 9:20am

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A highly structured abstract painting in soft colors, featuring sweeping geometric arcs, concentric circles, and precise spirals, conceptually representing the forces and conditions encountered by the Artemis II spacecraft during its reentry into Earth's atmosphere.The Artemis II spacecraft's reentry through Earth's atmosphere, a critical and complex phase of the mission, is visualized through a bold, abstract scientific diagram.San Diego Today

The Artemis II mission concluded with the successful reentry and splashdown of the Orion spacecraft off the coast of San Diego. During the intense reentry process, NASA experienced a planned six-minute communication blackout as the spacecraft encountered extreme heat and friction, creating a plasma bubble that blocked radio signals. This temporary challenge highlighted the astronauts' training and focus, as they monitored onboard systems without the usual communication support from Mission Control.

Why it matters

The Artemis II reentry demonstrates the precision and complexity of NASA's deep space exploration program. The communication blackout during this critical phase underscores the technical challenges of human spaceflight and the importance of the crew's ability to remain calm and focused in the face of temporary communication loss. This mission marks a significant milestone in the Artemis program's goal of returning humans to the Moon.

The details

As Orion hurtled towards Earth at over 24,000 mph, it encountered the thickening atmosphere, generating immense friction and heat of up to 5,000 degrees Fahrenheit. This extreme environment created a plasma bubble that engulfed the spacecraft and blocked radio signals from reaching Mission Control for a planned six-minute period. During this time, the heat shield on the underside of the spacecraft played a crucial role in protecting the crew and the spacecraft from the intense reentry temperatures. After the blackout, the spacecraft continued its descent, deploying parachutes to slow its speed to a safer 20 mph at splashdown.

  • The Artemis II crew will be welcomed back to Earth at 5:07 p.m. PT/8:07 p.m. ET on April 10, off the coast of San Diego.

The players

Orion

The spacecraft that carried the Artemis II crew on their historic mission to the Moon.

Artemis II

The second mission in NASA's Artemis program, which aims to return humans to the Moon.

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The takeaway

The Artemis II mission's reentry phase is a remarkable feat of engineering and human resilience, showcasing the astronauts' ability to remain calm and focused during critical moments to ensure their safe return to Earth. The temporary communication blackout is a small price to pay for the ultimate goal of a successful reentry and the safe homecoming of the Artemis II crew.