Houston, Texas - Early Monday morning the four-person Artemis II crew crossed into the moon's gravitational sphere of influence, continuing on a flight path that will take them over the shadowed far side of the moon and position them to become the farthest-traveling humans in history.
The astronauts - NASA's Reid Wiseman, Victor Glover and Christina Koch, together with Canadian astronaut Jeremy Hansen - have been aboard the Orion capsule since their launch from Florida last week. They are scheduled to awake at about 10:50 a.m. ET Monday to begin their sixth flight day aboard the spacecraft.
Mission planners say the capsule will reach its maximum separation from Earth at approximately 7:05 p.m. ET, arriving at roughly 252,757 miles from the planet. That distance exceeds the 56-year-old human spaceflight record set by the Apollo 13 crew by 4,102 miles.
The peak distance coincides with the spacecraft's transit around the moon's far side. As Artemis II sails above the moon's darkened face, crew members will be roughly 4,000 miles above the shadowed lunar surface and will observe the moon eclipsing a distant, basketball-sized Earth in the background.
Officially beginning at 2:34 p.m. ET, the planned lunar flyby will plunge the crew into darkness and produce brief communications blackouts as the moon blocks signals between the Orion capsule and NASA's Deep Space Network - the global set of large radio antennas used to maintain contact with the mission.
The flyby will last about six hours. During that interval, the astronauts will use professional cameras to photograph the silhouetted lunar limb through Orion's window, capturing sunlight filtering around the moon's edges in what the mission describes as effectively a lunar eclipse. The crew will also have an opportunity to photograph the moment the Earth appears to rise from the lunar horizon as the capsule emerges from the far side.
A team of dozens of lunar scientists stationed in the Science Evaluation Room at NASA's Johnson Space Center in Houston will be monitoring and taking notes while the astronauts relay their observations in real time. The crew practiced describing a range of lunar phenomena during mission training in preparation for this live reporting and targeted documentation.
This milestone represents a climactic point in the nearly 10-day Artemis II mission, which serves as the first crewed test flight of NASA's broader Artemis program. The multibillion-dollar series of missions aims to return astronauts to the moon's surface by 2028, prior to China, and to establish a sustained U.S. presence on the moon over the coming decade, including construction of a moon base intended as a proving ground for potential future missions to Mars.
Operational context - The sequence of events for the lunar flyby, including the scheduled awakening, the timing of the far-side transit, and the cameras-on observation window, reflects the mission's dual objectives of testing crewed spacecraft systems and collecting scientifically useful observations from a rare vantage point.
Data and observation - Photographic documentation from the far side will provide views of sunlight wrapping the moon's edge and the distant Earth rising from the lunar horizon. Those images, transmitted when communications are re-established, will be evaluated by the on-site science team in Houston.
All timings and figures reported reflect mission control schedules and NASA's stated distances and durations for the Artemis II flyby operations.