Following a highly successful lunar flyby, NASA and Artemis 2 mission managers held a press briefing on Tuesday to detail spacecraft performance, early science returns, and the crew’s trajectory back to Earth.
The Orion spacecraft, carrying NASA astronauts Reid Wiseman, Victor Glover, Christina Koch, and Canadian Space Agency (CSA) astronaut Jeremy Hansen, has officially exited the lunar sphere of influence. Having completed humanity’s first crewed lunar pass in over 50 years, the crew is now firmly on track for a Friday splashdown.
Trajectory and spacecraft operations
During the flyby, the Artemis 2 crew officially surpassed the Apollo 13 distance record, reaching a maximum distance of 400,171 kilometres (248,655 miles) from Earth.
Orion is currently on a nominal return trajectory. Separation of the crew and service modules is slated for Friday at 7:33 p.m. ET, with splashdown expected at 8:07 p.m. ET. Recovery weather off the coast of San Diego is currently favourable, and the USS John P. Murtha is en route to the landing zone.
Artemis 2 Entry Flight Director Rick Henfling and Dr. Lori Glaze, Deputy Associate Administrator noted that Orion is performing exceptionally well. The only notable hardware issue remains a blockage in the wastewater venting system. The system remains operational, and engineers are managing the issue by deferring maintenance cycles due to the lower vent rate.
Data transmission has also been highly successful. The onboard optical communications system downlinked 20 GB of data in just over 45 minutes, a significant increase in bandwidth compared to standard S-band telemetry. Overall, the spacecraft captured over 175 GB of imagery during the lunar pass alone.
Early lunar science returns
While orbital flybys are primarily observational, having human eyes in deep space provides a distinct advantage over robotic probes. The crew acted as real-time geological field assistants, testing hypotheses and identifying targets that will shape future surface missions.
During the lunar eclipse period, the crew observed the Moon in near-total darkness, illuminated only by “Earthshine.” In this window, they witnessed four to six distinct micrometeorite impact flashes. Observing the frequency and location of these flashes helps scientists accurately map the rate of micrometeorite impacts, data that is critical for engineering shielding for future long-duration surface habitats. The Lunar Reconnaissance Orbiter (LRO) team is currently using the crew’s location sketches to hunt for the fresh impact sites.
Significant geological observations were also made at Ohm crater. The crew noted that the colours and albedo (brightness) of the material changed at different points along the crater’s massive ejecta rays. Because a massive impact digs deep into the Moon’s crust, the varying colours indicate that the meteor punched through distinct geological layers.
“Impact events are really compelling… they can excavate material from great depths below the surface, which means they’re kind of like a geologist cheat code,” said Dr. Kelsey Young, Artemis II Lunar Science Lead. “You can’t get all the way down there by yourself. But when an impact has brought up that material for you, it can actually perform that excavation.”
The crew also reported distinct color variations over the Aristarchus plateau, noting green hues alongside varying shades of brown. These color shifts correspond to different chemical compositions and ancient volcanic activity, helping scientists calibrate orbital camera data.
Additionally, Pilot Victor Glover focused on the “Terminator”—the dividing line between the day and night sides of the Moon. The lighting features incredibly low sun angles, creating deep shadows that heavily accentuate topography. This is the exact lighting condition astronauts will face when landing at the Lunar South Pole on Artemis III. Understanding how the human eye adapts to this extreme contrast will directly inform descent training for the next crew.
“When we took the time to actually talk to each other about a specific target that we were both seeing, we elevated each other,” Dr. Young said, paraphrasing the crew’s experience at the windows. “More brains on a scientific target are better than one, and we heard from them directly multiple times that they were helping each other to advance their scientific understanding of what they were looking at.”
Looking to the future
In a poignant moment during the flyby, the crew proposed names for two previously unnamed craters. They suggested “Integrity,” in honour of their spacecraft, and “Carroll,” in memory of Commander Reid Wiseman’s late wife. The names will be submitted to the International Astronomical Union for official consideration upon their return.
While the crew’s focus is now on their return to Earth, their record-breaking vantage point offered a glimpse of what comes next. As they surpassed the Apollo 13 distance record in deep space, the astronauts transmitted a message hoping their new milestone would quickly be broken by future explorers.
“They challenged this generation and the next to make sure that this record is not long-lived,” Dr. Glaze noted during the briefing. “And I love that because we have big plans to go not just back to the Moon on a regular basis, but beyond.”
That future was literally in sight during the lunar eclipse, as the crew noted several planets visible against the blackness of space.
“They were looking at the planets, and I can’t remember who said it, but they said, ‘One of them looks kind of red,'” Dr. Glaze recalled. “And Kelsey’s observation was, ‘That’s Mars. You’re looking at your future.'”
Editor’s note: The story has been updated to reflect the correct spelling of Reid Wiseman’s wife’s name, which is Carroll.