As the supercooled propellant flowed into the core stage, and NASA’s SLS (Space Launch System) rocket roared to life, Allison Mjoen and her family watched with awe and pride. Mjoen, NASA’s operations manager for the agency’s Exploration Ground Systems Program, helped shape the systems and ground operations that will one day send humans back to the Moon. Over her 20-year career at NASA’s Kennedy Space Center in Florida, she supported missions across the Space Shuttle Program, the International Space Station, and now she is applying that experience to Artemis.

April 1, 2026, was a bright, crystal-clear day along the Florida Space Coast. The sunlight seemed to sharpen every color along the horizon. As Mjoen and her children counted down and the crowd’s voices rose around them, the rumble of the SLS rocket intensified beneath their feet. For her children, it was the chance to see what their mom had helped make possible. For Mjoen, it was a moment she would never forget.

That moment also offered a pause for reflection on the work that led her there. As the spacecraft offline operations manager, Mjoen coordinates the work that happens long before launch day. By supporting the ground systems’ senior vehicle operations manager, Matt Czech, she develops integration plans and oversees ground operations for Artemis vehicle processing, focusing on booster and Orion spacecraft operations.

Mjoen began her career as a flight crew systems engineer with United Space Alliance supporting the Space Shuttle Program. Her team handled mission-specific cabin configurations, including the food, spacesuits, cargo, and payloads astronauts needed aboard the shuttle.

After the Space Shuttle Program retired, she supported the International Space Station Program as a payload integration engineer. In this role, she connected experiment investigators with the organizations developing their hardware. She later worked in the Project Office on the Test and Operations Support Contract before joining NASA’s Operations Project Engineering Office, where she served as the Spacecraft Payloads Integration and Evolution Element lead for Artemis I.

That preparation took on new meaning when she first supported integrated firing room operations as a certified operations project engineer during Artemis I. Earning the certification was a milestone. Applying it during real time operations brought a new level of responsibility.

“Every decision and communication directly supported the integrated team’s ability to execute safely and properly implement the test procedure,” said Mjoen.

Working at the integration console underscored the importance of preparation, collaboration and trust — lessons she carries into her work coordinating across teams today.

For Mjoen, the shared experience is part of what makes Artemis so important. As the Artemis program continues, she looks forward to another moment families will be able to share as astronauts return to the lunar surface.

“That single moment captured the imagination of people around the world and showed what is possible when we come together for a bold goal,” she said of the first Apollo Moon landing. “Artemis is creating that kind of moment for a whole new generation, and this time to stay.”

As the supercooled propellant flowed into the core stage, and NASA’s SLS (Space Launch System) rocket roared to life, Allison Mjoen and her family watched with awe and pride. Mjoen, NASA’s operations manager for the agency’s Exploration Ground Systems Program, helped shape the systems and ground operations that will one day send humans back to the Moon. Over her 20-year career at NASA’s Kennedy Space Center in Florida, she supported missions across the Space Shuttle Program, the International Space Station, and now she is applying that experience to Artemis.

April 1, 2026, was a bright, crystal-clear day along the Florida Space Coast. The sunlight seemed to sharpen every color along the horizon. As Mjoen and her children counted down and the crowd’s voices rose around them, the rumble of the SLS rocket intensified beneath their feet. For her children, it was the chance to see what their mom had helped make possible. For Mjoen, it was a moment she would never forget.

That moment also offered a pause for reflection on the work that led her there. As the spacecraft offline operations manager, Mjoen coordinates the work that happens long before launch day. By supporting the ground systems’ senior vehicle operations manager, Matt Czech, she develops integration plans and oversees ground operations for Artemis vehicle processing, focusing on booster and Orion spacecraft operations.

Mjoen began her career as a flight crew systems engineer with United Space Alliance supporting the Space Shuttle Program. Her team handled mission-specific cabin configurations, including the food, spacesuits, cargo, and payloads astronauts needed aboard the shuttle.

After the Space Shuttle Program retired, she supported the International Space Station Program as a payload integration engineer. In this role, she connected experiment investigators with the organizations developing their hardware. She later worked in the Project Office on the Test and Operations Support Contract before joining NASA’s Operations Project Engineering Office, where she served as the Spacecraft Payloads Integration and Evolution Element lead for Artemis I.

That preparation took on new meaning when she first supported integrated firing room operations as a certified operations project engineer during Artemis I. Earning the certification was a milestone. Applying it during real time operations brought a new level of responsibility.

“Every decision and communication directly supported the integrated team’s ability to execute safely and properly implement the test procedure,” said Mjoen.

Working at the integration console underscored the importance of preparation, collaboration and trust — lessons she carries into her work coordinating across teams today.

For Mjoen, the shared experience is part of what makes Artemis so important. As the Artemis program continues, she looks forward to another moment families will be able to share as astronauts return to the lunar surface.

“That single moment captured the imagination of people around the world and showed what is possible when we come together for a bold goal,” she said of the first Apollo Moon landing. “Artemis is creating that kind of moment for a whole new generation, and this time to stay.”

As the supercooled propellant flowed into the core stage, and NASA’s SLS (Space Launch System) rocket roared to life, Allison Mjoen and her family watched with awe and pride. Mjoen, NASA’s operations manager for the agency’s Exploration Ground Systems Program, helped shape the systems and ground operations that will one day send humans back to the Moon. Over her 20-year career at NASA’s Kennedy Space Center in Florida, she supported missions across the Space Shuttle Program, the International Space Station, and now she is applying that experience to Artemis.

April 1, 2026, was a bright, crystal-clear day along the Florida Space Coast. The sunlight seemed to sharpen every color along the horizon. As Mjoen and her children counted down and the crowd’s voices rose around them, the rumble of the SLS rocket intensified beneath their feet. For her children, it was the chance to see what their mom had helped make possible. For Mjoen, it was a moment she would never forget.

That moment also offered a pause for reflection on the work that led her there. As the spacecraft offline operations manager, Mjoen coordinates the work that happens long before launch day. By supporting the ground systems’ senior vehicle operations manager, Matt Czech, she develops integration plans and oversees ground operations for Artemis vehicle processing, focusing on booster and Orion spacecraft operations.

Mjoen began her career as a flight crew systems engineer with United Space Alliance supporting the Space Shuttle Program. Her team handled mission-specific cabin configurations, including the food, spacesuits, cargo, and payloads astronauts needed aboard the shuttle.

After the Space Shuttle Program retired, she supported the International Space Station Program as a payload integration engineer. In this role, she connected experiment investigators with the organizations developing their hardware. She later worked in the Project Office on the Test and Operations Support Contract before joining NASA’s Operations Project Engineering Office, where she served as the Spacecraft Payloads Integration and Evolution Element lead for Artemis I.

That preparation took on new meaning when she first supported integrated firing room operations as a certified operations project engineer during Artemis I. Earning the certification was a milestone. Applying it during real time operations brought a new level of responsibility.

“Every decision and communication directly supported the integrated team’s ability to execute safely and properly implement the test procedure,” said Mjoen.

Working at the integration console underscored the importance of preparation, collaboration and trust — lessons she carries into her work coordinating across teams today.

For Mjoen, the shared experience is part of what makes Artemis so important. As the Artemis program continues, she looks forward to another moment families will be able to share as astronauts return to the lunar surface.

“That single moment captured the imagination of people around the world and showed what is possible when we come together for a bold goal,” she said of the first Apollo Moon landing. “Artemis is creating that kind of moment for a whole new generation, and this time to stay.”

NASA’s Artemis II mission sent four astronauts around the Moon and brought them safely back to Earth, laying a foundation for crewed flights to the Moon’s surface.

Additional engineering data analysis of the Orion spacecraft’s heat shield confirmed initial data showing the heat shield performed as expected.  

In particular, NASA measured whether the thermal protection system effectively safeguarded the crew and Orion systems as the spacecraft reentered Earth’s atmosphere. This test flight was the first time astronauts flew aboard Orion. 

Orion reached a maximum velocity of 39 times the speed of sound and experienced external temperatures exceeding 4,000 degrees Fahrenheit at its peak, all while the four astronauts inside Orion stayed relatively cool with a cabin temperature in the mid-70 degree Fahrenheit range during their return to Earth from the Moon.  

After NASA’s thorough analysis of Artemis I heat shield findings, informed by extensive arc jet material testing at NASA’s Ames Research Center in California’s Silicon Valley, the agency modified Orion’s reentry trajectory for Artemis II by shortening the maximum downrange distance the spacecraft could fly between when it entered Earth’s atmosphere and splashed down in the Pacific Ocean. Analysis prior to the mission showed that limiting downrange distance would limit how long the spacecraft’s heat shield spent in the temperature range at which the Artemis I heat shield phenomenon occurred.  

The spacecraft reentered with precision, entering within only 192 feet of its targeted entry interface, and successfully splashed down only 0.59 miles from the predicted landing site off the coast of San Diego. Initial inspections of the thermal protection system, including diver imagery of the spacecraft’s heat shield taken just after splashdown and further inspections on the recovery ship, found it performed as expected, with a significant reduction in the amount of cracks and char loss as compared to Artemis I.  

Upon the spacecraft’s return to NASA’s Kennedy Space Center in Florida after the Moon mission, thermal protection system experts began additional examination of the heat shield, made of 186 unique blocks of an ablative material called Avcoat. The heat shield was then transported to NASA’s Marshall Space Flight Center in Huntsville, Alabama, where work on sample extraction and internal x-ray scans began in August to provide further engineering insight into the system and behavior of the material.

A thorough post-flight assessment review found that Orion’s aerodynamic and aerothermal performance, including the heat shield and backshell thermal protection system, was in line with engineering predictions based on pre-flight analyses and ground testing. The shorter allowable down range during entry reduced the cracking and char loss experienced on the Artemis II heat shield relative to the Artemis I heat shield by a factor of ten, proving the effectiveness of the trajectory modification. Engineers found only nine spots of char loss of varying sizes on the Artemis II heat shield dish, compared to 103 during Artemis I. 

The analysis also showed that Orion’s robust heat shield design showed consistency from Artemis I to Artemis II, evident by the performance of system features such as the seams between the heat shield Avcoat blocks and the Avcoat surrounding the heat shield compression pad separation bolts. 

Post-flight inspection of Orion’s backshell, the protective cover on the sloped sides of the crew module made up of 1,300 ceramic tiles, showed expected performance across the crew module surface. Visual inspections indicated backshell features designed to seal and protect penetrations such as windows, vents, thrusters, and the side hatch also met expectations, with no signs of overheating observed. 

The team also performed post-flight laser scans of the heat shield surface and is comparing this data to pre-flight measurements to determine material recession, which will then be compared to analysis predictions. Engineers are continuing with heat shield sample extraction at NASA Marshall and subsequent material test and assessment and thermal analysis, to support long-term heat shield development, manufacturing efforts, and data capture. 

Orion’s performance and the team’s analysis on Artemis II reflect system robustness, capability to support crew, and critical insights gathered that will enhance the Artemis III mission and beyond. Following the extensive Artemis I heat shield investigation, upgrades were made to the heat shield design for Artemis III to achieve uniformity and consistent permeability of the Avcoat blocks. Technicians attached the heat shield for the Artemis III Orion crew module at NASA Kennedy in early July, and the Orion crew and service modules were joined at the end of July. The spacecraft has since been successfully powered up for the first time, enabling engineers to check all connection lines between the two modules are working as planned.

NASA continues to advance toward Artemis III as teams ready the Orion spacecraft for next year’s mission in low Earth orbit. NASA will launch the SLS (Space Launch System) rocket and Orion spacecraft with NASA astronauts Randy Bresnik, Frank Rubio, Andre Douglas, and ESA (European Space Agency) Luca Parmitano, to rendezvous with human lander test articles from Blue Origin and SpaceX to demonstrate critical systems and operations needed for future lunar landings, beginning with Artemis IV in 2028.

NASA will provide an update on its plans to return American astronauts to the surface of the Moon by 2028 at 2 p.m. EDT, Friday, Oct. 23, at the agency’s Kennedy Space Center in Florida.

Learn where to watch online:

https://www.nasa.gov/live

Participants in the briefing include:

• NASA Administrator Jared Isaacman
• NASA Associate Administrator Amit Kshatriya
• Jeremy Parsons, NASA’s Artemis program manager

The update will include details about NASA’s Artemis III mission that will send four astronauts to low Earth orbit next year to test critical systems needed for future lunar landings, and how plans to return American astronauts to the Moon by 2028 are progressing.

U.S. media interested in attending in person must apply online by 12 p.m., Friday, Oct. 16. To ask questions remotely, media must request the dial-in number from the Kennedy newsroom no later than one hour prior to the start of the update by emailing: ksc-newsroom@mail.nasa.gov. NASA’s media accreditation policy is online. 

As part of a Golden Age of innovation and exploration, NASA will send Artemis astronauts on increasingly difficult missions near the lunar South Pole to explore more of the Moon than ever before. In addition to providing economic benefits and advancing scientific discovery through its Moon missions, NASA will establish an enduring human presence on the lunar surface and build on the agency’s foundation for the first crewed mission to Mars.

Learn more about Artemis:

https://www.nasa.gov/artemis

-end-

Rachel Kraft
Headquarters, Washington
202-358-1600
rachel.h.kraft@nasa.gov

Tiffany Fairley
Kennedy Space Center, Fla.
321-867-2468
tiffany.l.fairley@nasa.gov