The four astronauts participating in NASA’s Artemis II mission have entered the moon’s “sphere of influence,” where the lunar gravity exerts a stronger force on the spacecraft than that of Earth.
This transition occurred four days, six hours, and two minutes into the mission, when the crew was approximately 39,000 miles (62,800 kilometers) from the moon and about 232,000 miles (373,400 kilometers) from Earth. Their next significant milestone is a journey to the moon’s far side scheduled for later on Monday, a venture that will take them deeper into space than any humans have gone before.
Lori Glaze, NASA’s deputy associate administrator for Exploration Systems Development Mission, expressed enthusiasm about the upcoming flyby. “We’re all extremely excited for tomorrow,” she stated on Sunday. “Our flight operations team and our science team are ready for the first lunar flyby in over 50 years.”
The Artemis II astronauts are the first to head toward the moon in more than 50 years, continuing the legacy of the Apollo program that concluded in 1972.
While the Apollo missions of the 1960s and 1970s orbited about 70 miles above the lunar surface, the Artemis crew will approach from over 4,000 miles, providing a unique opportunity to observe the moon’s entire spherical surface, including areas near both poles.
During the flyby, which is expected to last around six hours, the astronauts will observe the moon using both their eyes and onboard cameras. This journey will grant them views of the moon’s far side that were previously inaccessible to the 24 Apollo astronauts.
As the Orion spacecraft passes behind the moon, the mission will experience a planned communication blackout lasting about 40 minutes, during which the lunar surface will obstruct the radio signals required for the Deep Space Network to maintain contact with the spacecraft.
Kelsey Young, the lead scientist for Artemis II, highlighted the unpredictable nature of the observations, stating, “It’s important to remember that we don’t always know exactly what they’re going to see,” during a press conference on Sunday.
If all goes as planned, the astronauts—Americans Christina Koch, Reid Wiseman, Victor Glover, and Canadian Jeremy Hansen—could set a record for traveling farther from Earth than any humans before them.
The crew has already witnessed sights of the lunar surface that have never been seen by human eyes. Early on Sunday, NASA released an image captured by the Artemis II team, which showcased the Orientale basin, often referred to as the moon’s “Grand Canyon.”
Nasa stated, “This mission marks the first time the entire basin has been seen with human eyes.” Although the crater has been photographed from orbit, this marks a historic first for human observation.
As the astronauts began day five of their 10-day mission, the Orion spacecraft was located nearly 215,000 miles (346,000 kilometers) from Earth and 65,000 miles from the moon, according to NASA’s online dashboard.
Former astronaut Charlie Duke, who walked on the moon during the Apollo 16 mission in 1972, provided the ceremonial wakeup call for the crew. He expressed his support, saying, “Below you on the moon is a photo of my family. I pray it reminds you that we in America and all of the world are cheering you on. Thanks to you and the whole team on the ground for building on our Apollo legacy with Artemis,” reflecting on his experiences at the age of 90.
Nasa reported that the Artemis crew successfully completed a manual piloting demonstration and reviewed their lunar flyby strategy, including a detailed assessment of the surface features they are to analyze and photograph during their orbit around the moon.
Chief of NASA, Jared Isaacman, emphasized the focus on the spacecraft’s life support systems, stating, “This is the first time astronauts have ever flown on this spacecraft. That’s what we’re most interested in getting data from,” during a televised interview with CNN on Sunday.
On the fifth day of their mission, the astronauts were also testing their “survival” suits, bright orange garments designed for takeoff and re-entry, as well as emergency situations like cabin depressurization.
While the astronauts will not land on the moon’s surface, they are set to break the record for the greatest distance from Earth during their moon pass.
Over the coming day, “they will be on the far side of the moon, they will eclipse that record, and we’re going to learn an awful lot about the spacecraft,” Isaacman noted.
The data collected will be “paramount for subsequent missions, including Artemis III in 2027 and the lunar landing on Artemis IV in 2028,” he added.
With contributions from Agence France-Presse.
