The four astronauts of NASA’s Artemis II mission are today entering the gravitational dominion of the Moon, closing the final distance to Earth’s celestial neighbor as they prepare for a Monday flyby that will carry them farther from their home planet than any human beings have ever traveled. According to NASA, the Orion spacecraft — christened Integrity by its crew — is on a precise trajectory toward an April 6 rendezvous with the lunar far side, the culmination of a test flight that has already restored the United States to its rightful position as the only nation capable of projecting human presence into deep space.
NASA confirmed that the crew began Flight Day 5 at noon Eastern on Sunday, April 5, after Mission Control at Johnson Space Center in Houston woke the astronauts from a scheduled rest period. The crew of NASA astronauts Commander Reid Wiseman, Pilot Victor Glover, and Mission Specialist Christina Koch, along with Canadian Space Agency astronaut and Mission Specialist Jeremy Hansen, has been en route to the Moon since the Space Launch System rocket lifted off from Launch Pad 39B at Kennedy Space Center in Florida at 6:35 p.m. EDT on Wednesday, April 1, according to NASA’s launch day updates.
Scientific American reported that on Flight Day 5, Orion is expected to slip into the Moon’s gravitational sphere of influence — the point at which the pull of lunar gravity becomes stronger than the pull of Earth’s gravity. According to NASA’s daily mission agenda, this marks a transition in the dynamics governing the spacecraft’s trajectory, though Orion will not enter lunar orbit. The crew’s morning is to be devoted largely to tests of their Orion crew survival system spacesuits, according to NASA, including practicing the speed with which they can don the suits, pressurize them, and strap into their seats — a critical evaluation for the first astronauts ever to wear the new suits in the deep-space environment.
The spacecraft’s position on the prior day underscored the vast distances now being traversed by American astronauts for the first time in more than half a century. NASA reported that at crew wakeup on Flight Day 4 — Saturday, April 4 — the spacecraft and its crew were approximately 169,000 miles from Earth and 110,700 miles from the Moon. Pilot Victor Glover reported to the ground, according to the Associated Press, that “the Earth is quite small, and the moon is definitely getting bigger.”
The crew wrapped up a productive Flight Day 4 that included a manual piloting demonstration in deep space. According to NASA, mission specialists Christina Koch and Jeremy Hansen took turns controlling the spacecraft beginning at 9:09 p.m. EDT, testing two different thruster modes — six degrees of freedom and three degrees of freedom — for forty-one minutes to provide engineers with data about Orion’s handling qualities. Commander Wiseman and Pilot Glover are scheduled to repeat the demonstration on Flight Day 8, April 9, according to the agency, to give ground teams additional data from different pilots. ABC News reported that Glover was also scheduled for a separate deep-space handling test to evaluate how the spacecraft responds to manual maneuvers far from Earth.
All eyes now turn to Monday, April 6, when the crew will execute the mission’s defining sequence: a seven-hour lunar observation window that NASA confirmed will run from 2:45 p.m. to 9:40 p.m. EDT. During this period, according to NASA’s Flight Day 4 blog, Orion’s main cabin windows will be pointed toward the Moon, and the crew will be close enough to conduct scientific observations of the lunar surface. The astronauts will photograph both the near and far sides of the Moon, with the shifting angle of solar illumination revealing both familiar nearside terrain and portions of the far side never before seen directly by human eyes, as NASA reported.
At closest approach, expected at approximately 7:02 p.m. EDT on Monday, Orion will fly 4,066 miles above the lunar surface, according to NASA. From that distance, the crew will see the entire disk of the Moon at once, including regions near the north and south poles — a vantage point the Apollo crews, who flew approximately 70 miles above the surface, never possessed. NASA’s Science Mission Directorate lead Kelsey Young explained during a Saturday briefing, according to ABC News, that parts of the lunar far side remain unfamiliar to human eyes because the Apollo missions launched when the near side was illuminated.
Toward the end of the flyby window, the crew will witness a solar eclipse from deep space lasting approximately 53 minutes, as ABC News reported, occurring as the Sun passes behind the Moon from Orion’s perspective. NASA stated that during this eclipse, the crew will analyze the solar corona — the Sun’s outermost atmosphere — as it appears at the Moon’s edge, and will search for flashes of light from meteoroid strikes on the darkened lunar surface to help scientists assess potential hazards for future landing missions.
The distance record is the mission’s most symbolically potent milestone. NASA confirmed that at 7:05 p.m. EDT on April 6, Orion is expected to reach a maximum distance of 252,757 miles from Earth — surpassing by approximately 4,102 miles the record of 248,655 miles set by the crew of Apollo 13 in April 1970. Space.com reported that this new distance estimate was calculated after Orion’s translunar injection burn and announced by Artemis II ascent flight director Judd Freiling during a press briefing. The Apollo 13 crew — Commander Jim Lovell, Lunar Module Pilot Fred Haise, and Command Module Pilot Jack Swigert — set the existing mark involuntarily, after an oxygen-tank explosion forced an emergency free-return trajectory around the Moon. The Artemis II crew, by contrast, will break the record by deliberate design aboard a spacecraft operating as intended.
When Orion passes behind the Moon, NASA reported that the mission will experience a planned communications blackout beginning at approximately 5:47 p.m. EDT — a silence familiar from both the Apollo missions and the uncrewed Artemis I flight in 2022. Once the spacecraft reemerges, the Deep Space Network is expected to quickly reacquire its signal.
The mission has proceeded with remarkable precision since its April 1 launch. The translunar injection burn on Thursday, April 2 — a firing of Orion’s European-built service module engine lasting five minutes and fifty seconds — committed the spacecraft to its free-return trajectory around the Moon and back, according to NASA. Flight controllers in Houston subsequently elected to cancel the first planned outbound trajectory correction burn, as NASA’s Flight Day 3 update confirmed, because Orion’s trajectory was already on the correct flight path. The agency’s Orion Artemis II Optical Communications System, which uses laser communications to transmit data at rates far exceeding traditional radio-frequency systems, had already surpassed 100 gigabytes of data downlinked during the mission as of Flight Day 4, including high-resolution imagery, according to NASA.
The crew itself represents a deliberate statement about who the United States sends to the frontier of human knowledge. Commander Wiseman, a former NASA chief astronaut and U.S. Navy test pilot, has spent 165 days in space on the International Space Station, according to ABC News. Pilot Glover, a U.S. Navy captain who served in Operation Iraqi Freedom and flew more than 40 aircraft types, is the first Black astronaut to travel into deep space, as reported by the National Air and Space Museum. Mission Specialist Koch holds the record for the longest single spaceflight by a woman at 328 consecutive days and participated in the first all-female spacewalks, as NASA confirmed. And Jeremy Hansen, a Canadian Forces colonel and CF-18 fighter pilot, is the first non-American citizen to fly to the Moon — a mark of the alliance that binds the United States and Canada in the shared architecture of exploration.
NASA Administrator Jared Isaacman set the mission’s stakes plainly at launch, stating according to the agency’s press release: “Artemis II is the start of something bigger than any one mission. It marks our return to the Moon, not just to visit, but to eventually stay on our Moon Base, and lays the foundation for the next giant leaps ahead.” NASA Associate Administrator Amit Kshatriya added that the crew has the machine they need to prove what the spacecraft can do, and that the work ahead remains greater than the work behind.
The spacecraft is expected to complete its flyby and begin the return trajectory toward Earth later next week, with splashdown in the Pacific Ocean off San Diego scheduled for approximately 8:07 p.m. EDT on Friday, April 10, according to NASA. Recovery teams will retrieve the crew by helicopter and deliver them to the USS John P. Murtha. The total distance traveled from launch to splashdown is expected to reach 695,081 miles, NASA confirmed.
The Artemis II test flight is the foundation upon which the broader Artemis campaign rests. It is the first crewed mission of the program and is intended to validate the life support, navigation, propulsion, and thermal systems that future crews will depend upon when they descend to the lunar surface on Artemis IV, currently planned for late 2028, according to Space.com. For the United States, the strategic calculation is unambiguous: the nation that masters sustained operations on the Moon positions itself to command the next century of human expansion beyond Earth. On Monday, four Americans and one allied Canadian will become the farthest human beings from home in the history of the species — and the record they break will be their own country’s.