Artemis II Completes First Crewed Lunar Flyby Since 1972, Setting Human Distance Record

Kennedy Space Center, Florida — 11 April 2026. NASA's Artemis II mission concluded on April 11 with a successful splashdown in the Pacific Ocean, completing the first crewed flight beyond low Earth orbit since Apollo 17 in 1972. The 10-day, 1-hour, and 32-minute mission carried four astronauts aboard the Orion spacecraft — named Integrity by its crew — on a free-return trajectory around the Moon, validating the spacecraft's life support, navigation, and deep-space operations ahead of planned lunar surface landings.

The mission launched on April 1, 2026, at 22:35 UTC from Launch Complex 39B at NASA's Kennedy Space Center in Florida, atop the Space Launch System (SLS) rocket. It marked the first crewed flight of both the SLS and the Orion spacecraft.

The Crew

The four-person crew represented several historic firsts for deep-space exploration:

Hansen's participation was facilitated by a 2020 treaty between the United States and Canada. The mission also broke the record for the most people in deep space simultaneously, previously set at three during Apollo 8 in December 1968.

Mission Profile

Artemis II followed a free-return trajectory — using the Moon's gravity to swing around the far side and redirect the spacecraft back toward Earth without requiring additional engine burns for the return leg. This trajectory resembled that flown by Apollo 13 in 1970.

The mission unfolded across 10 flight days:

Flight days 1–2: After launch, Orion entered a highly elliptical high Earth orbit with an apogee of approximately 71,000 km — the first time a crewed spacecraft had entered a high Earth orbit without proceeding directly to the Moon. The crew conducted system checkouts, tested life support, and performed a proximity operations demonstration using the spent Interim Cryogenic Propulsion Stage as a target. Pilot Victor Glover took manual control for approximately 70 minutes to evaluate Orion's handling qualities. A 5-minute, 49-second trans-lunar injection burn then placed Orion on course for the Moon.

Flight days 3–5: The crew tested manual spacecraft control modes, evaluated Orion Crew Survival System suits, and conducted a trajectory correction burn. A minor issue with the spacecraft's toilet — urine freezing in vent lines — was resolved by activating vent heaters and rotating the spacecraft to expose the vent to sunlight.

Flight day 6: Orion entered the Moon's sphere of influence and performed the lunar flyby. The spacecraft passed approximately 6,545 km from the far-side lunar surface at 23:00 UTC on April 6. Two minutes later, it reached its maximum distance from Earth: 406,771 km (252,756 miles), surpassing Apollo 13's record of 400,171 km set in 1970.

During the flyby, the crew observed two unnamed lunar craters, which they proposed naming Integrity (after their spacecraft) and Carroll (after Wiseman's late wife, who died of cancer in 2020). After passing behind the Moon, the crew experienced a 57-minute solar eclipse — observing the solar corona, meteoroid impact flashes on the dark lunar surface, and planets including Venus, Mars, Saturn, and Mercury.

Flight days 7–10: Orion exited the Moon's sphere of influence and began its return to Earth. The crew conducted an audio-only call with astronauts aboard the International Space Station — at that moment, the two crews represented the humans farthest apart from each other in history. Engineers used the return transit to characterize a small helium leak in the European Service Module, gathering data for future Artemis missions.

Heat Shield and Reentry

The Artemis II heat shield was a subject of significant scrutiny before launch. After the uncrewed Artemis I mission in November 2022, NASA engineers discovered unexpected erosion of the AVCOAT ablative heat shield — areas of char loss where the material eroded more extensively than predicted. An independent review team concluded in December 2024 that the char loss was caused by hot gases trapped within the AVCOAT material, leading to spalling and cracking.

Rather than replacing the heat shield, NASA modified the reentry trajectory. The original plan called for a skip reentry — briefly dipping into the upper atmosphere to generate lift and improve landing precision. Instead, Artemis II used a steeper direct entry trajectory to reduce the time the spacecraft spent in the thermal environment associated with the damage.

Integrity re-entered Earth's atmosphere at approximately 39,693 km/h (11 km/s) before decelerating. Splashdown occurred on April 11 at 00:07 UTC in the Pacific Ocean southwest of San Diego, California. The USS John P. Murtha recovered the crew — the first crewed NASA mission recovered by the U.S. Navy since the Apollo-Soyuz Test Project in 1975.

Science and Human Health Investigations

The crew facilitated scientific investigations during the transit, including studies on human health, sleep patterns, radiation exposure, and immune system changes. These studies are designed to inform future missions to the Moon and Mars, where crews will spend extended periods in deep-space radiation environments beyond Earth's protective magnetosphere.

NASA reported that the mission consumed less than half of the fuel aboard the European Service Module, indicating substantial margin for future missions that may require additional maneuvers.

The Road Ahead

Artemis II was a test flight supporting the Artemis program's goal of returning humans to the lunar surface. The mission's objectives paralleled those of Apollo 8 in 1968 — the first crewed lunar flight of the Apollo program — but with significantly more advanced spacecraft systems and a more diverse crew reflecting a half-century of change in space exploration.

The Lunar Gateway program, originally planned as a lunar space station to support Artemis missions, was cancelled in March 2026, simplifying the architecture for subsequent missions. NASA continues to prepare for Artemis III, which aims to return astronauts to the lunar surface, though a launch date has not been confirmed.

Sources

• NASA, Artemis II mission page and Artemis program page
• Wikipedia, "Artemis II," accessed August 2026
• Canadian Space Agency, Artemis II mission page
• ESA, Artemis II page
• NASA Office of Inspector General report on heat shield, May 2024
• NASA Artemis blog, 2026