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By NASA
2 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
The Artemis II Orion stage adapter, built at NASA’s Marshall Space Flight Center in Huntsville, Alabama. NASA Media are invited to NASA’s Marshall Space Flight Center in Huntsville, Alabama, at 2 p.m. CDT Thursday, Aug. 14 to view the final piece of space flight hardware for the agency’s SLS (Space Launch System) rocket for the Artemis II mission before it is delivered to NASA’s Kennedy Space Center in Florida. All other elements of the SLS rocket for Artemis II are stacked on mobile launcher 1 in the Vehicle Assembly Building at Kennedy. Artemis II, NASA’s first mission with crew aboard the SLS rocket and Orion spacecraft, is currently scheduled for a 10-day trip around the Moon no later than April 2026.
The Orion stage adapter, built by NASA Marshall, connects the SLS rocket’s interim cryogenic propulsion stage to NASA’s Orion spacecraft. The small ring structure is the topmost portion of the SLS rocket. The adapter will also carry small payloads, called CubeSats, to deep space.
Media will have the opportunity to capture images and video and speak to subject matter experts. Along with viewing the adapter for Artemis II, media will be able to see the Orion stage adapter for the Artemis III mission, the first lunar landing at the Moon’s South Pole.
This event is open to U.S. media, who must confirm their attendance by 12 p.m. CDT Wednesday, Aug. 13, with Jonathan Deal in Marshall’s Office of Communications at jonathan.e.deal@nasa.gov. Media must also report by 1:30 p.m. Thursday, Aug.14 to the Redstone Arsenal Joint Visitor Control Center Gate 9 parking lot, located at the Interstate 565 interchange at Research Park Boulevard, to be escorted to the event.
Through Artemis, NASA will send astronauts to explore the Moon for scientific discovery, economic benefits, and build the foundation for the first crewed missions to Mars.
For more on SLS, visit:
https://www.nasa.gov/humans-in-space/space-launch-system
Jonathan Deal
Marshall Space Flight Center, Huntsville, Ala.
256.631.9126
jonathan.e.deal@nasa.gov
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Last Updated Aug 11, 2025 EditorBeth RidgewayLocationMarshall Space Flight Center Related Terms
Space Launch System (SLS) Marshall Space Flight Center Explore More
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By NASA
NASA/Rad Sinyak The Artemis II crew (from left to right) CSA (Canadian Space Agency) astronaut Jeremy Hansen, and NASA astronauts Christina Koch, Victor Glover, and Reid Wiseman don their Orion Crew Survival System Suits for a multi-day crew module training beginning July 31, 2025, at the agency’s Kennedy Space Center in Florida. Behind the crew, wearing clean room apparel, are members of the Artemis II closeout crew.
Testing included a suited crew test and crew equipment interface test, performing launch day and simulated orbital activities inside the Orion spacecraft. This series of tests marks the first time the crew entered their spacecraft that will take them around the Moon and back to Earth while wearing their spacesuits.
Image credit: NASA/Rad Sinyak
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By NASA
The Artemis II crew (from left to right) CSA (Canadian Space Agency) Jeremy Hansen, mission specialist; Christina Koch, mission specialist; Victor Glover, pilot; and Reid Wiseman, commander, don their Orion Crew Survival System Suits for a multi-day crew module training beginning Thursday, July 31, 2025 at the agency’s Kennedy Space Center in Florida. Behind the crew, wearing clean room apparel, are members of the Artemis II closeout crew. NASA/Rad Sinyak The first crew slated to fly in NASA’s Orion spacecraft during the Artemis II mission around the Moon early next year entered their spacecraft for a multi-day training at the agency’s Kennedy Space Center in Florida. Crew donned their spacesuits July 31 and boarded Orion to train and experience some of the conditions they can expect on their mission.
NASA astronauts Reid Wiseman, Victor Glover, and Christina Koch, and CSA (Canadian Space Agency) astronaut Jeremy Hansen participated in a suited crew test and crew equipment interface test, performing launch day and simulated orbital activities inside Orion.
Every milestone in the Artemis campaign brings us closer to landing Americans back on the Moon and pushing onward to Mars.
sEAN dUFFY
acting NASA Administrator
“In about six months, Artemis II astronauts will journey around the Moon for the first time in 53 years,” Duffy said. “America rallied behind Apollo because it represented the best of us – now it’s Artemis’ turn. They’re not just carrying a flag – they’re carrying the pride, power, and promise of the United States of America.”
With Orion powered on, the suited crew test was a close representation of what the crew can expect on launch day. The crew began the day by suiting up inside the spaceport’s Multi-Operation Support Building, donning their Orion crew survival system spacesuits, boarding the zero-emission crew transportation vehicles, and entering Orion, which is currently inside the Multi-Payload Processing Facility, where engineers have loaded its propellants over the course of several weeks.
Once in Orion, the crew performed several launch day activities, including communications checkouts and suit leak checks. For the first time, the crew was connected to the spacecraft and its communications and life control systems, and all umbilicals were connected while the spacecraft operated on full power.
Teams simulated several different ground and flight conditions to give the crew more experience managing them in real time. Some of the activities simulated scenarios where the crew was challenged to address potential issues while in space such as leaks and failure of the air revitalization system fan, which is needed to provide oxygen and remove carbon dioxide from the cabin. Getting this hands-on experience and learning how to act fast to overcome potential challenges during flight helps ensure the crew is ready for any scenario.
The test provides astronauts the ability to train on the actual hardware they will use during flight, allowing them and support teams the opportunity to familiarize themselves with the equipment in configurations very close to what will be experienced during flight. It also allows teams to verify compatibility between the equipment and systems with flight controller procedures, so they can make any final adjustments ahead of launch.
This test brings together the Artemis II crew and the Orion spacecraft that will carry them to the Moon and back.
Shawn Quinn
NASA's Exploration Ground Systems Program manager
“It signifies the immense amount of work that our operations and development teams put into making sure we are ready for launch.” Quinn said. “They have meticulously planned each operation, timing them to perfection – and now we put it to the test.”
Exchanging their spacesuits for cleanroom garments for the crew equipment interface test, and with the spacecraft powered off, the crew also performed many of the activities they are likely to do in flight and conducted additional equipment checks. The crew practiced removing and stowing the foot pans on the pilot and commander seats, which will allow them to have more open space in the cabin after launch. They also accessed the stowage lockers and familiarized themselves with cameras, associated cables and mounts, and the environmental control and life support system hardware.
In addition to getting practical experience with the actual hardware they’ll use in space, they also prepared for life in deep space, reviewing cabin labels, sleep arrangements and checklists, and the hygiene bay.
Through the Artemis campaign, NASA will send astronauts to explore the Moon for scientific discovery, economic benefits, and to build the foundation for the first crewed missions to Mars – for the benefit of all.
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By NASA
Before astronauts venture around the Moon on Artemis II, the agency’s first crewed mission to the Moon since Apollo, Mark Cavanaugh is helping make sure the Orion spacecraft is safe and space-ready for the journey ahead.
As an Orion integration lead at NASA’s Johnson Space Center in Houston, he ensures the spacecraft’s critical systems— in both the U.S.-built crew module and European-built service module—come together safely and seamlessly.
Mark Cavanaugh stands in front of a mockup of the Orion spacecraft inside the Space Vehicle Mockup Facility at NASA’s Johnson Space Center in Houston.NASA/Robert Markowitz With nearly a decade of experience at NASA, Cavanaugh currently works within the Orion Crew and Service Module Office at Johnson. He oversees the technical integration of the European Service Module, which provides power, propulsion, and life support to Orion during Artemis missions to the Moon. His work includes aligning and verifying essential systems to keeping the crew alive, including oxygen, nitrogen, water storage, temperature regulation, and spacecraft structures.
In addition to his integration work, Cavanaugh is an Orion Mission Evaluation Room (MER) manager. The MER is the engineering nerve center during Artemis flights, responsible for real-time monitoring of the Orion spacecraft and real-time decision-making. From prelaunch to splashdown, Cavanaugh will lead a team of engineers who track vehicle health and status, troubleshoot anomalies, and communicate directly with the flight director to ensure the mission remains safe and on track.
Mark Cavanaugh supports an Artemis I launch attempt from the Passive Thermal Control System console on Aug. 29, 2022, in the Orion Mission Evaluation Room at NASA’s Johnson Space Center.NASA/Josh Valcarcel Cavanaugh’s passion for space exploration began early. “I’ve wanted to be an aerospace engineer since I was six years old,” he said. “My uncle, who is also an aerospace engineer, used to take me to wind tunnel tests and flight museums as a kid.”
That passion only deepened after a fifth-grade trip from Philadelphia to Houston with his grandfather. “My dream of working at NASA Johnson started when I visited the center for the first time,” he said. “Going from being a fifth grader riding the tram on the tour to contributing to the great work done at Johnson has been truly incredible.”
Turning that childhood dream into reality did not come with a straight path. Cavanaugh graduated from Pennsylvania State University in 2011, the same year NASA’s Space Shuttle Program ended. With jobs in the space industry in short supply, he took a position with Boeing in Houston, working on the International Space Station’s Passive Thermal Control System. He later supported thermal teams for the Artemis Moon rocket called the Space Launch System, and the Starliner spacecraft that flew astronauts Butch Wilmore and Suni Williams during their Boeing Crew Flight Test mission, before a mentor flagged a NASA job posting that turned out to be the perfect fit.
He joined NASA as the deputy system manager for Orion’s Passive Thermal Control System, eventually stepping into his current leadership role on the broader Orion integration team. “I’ve been very lucky to work with some of the best and most supportive teammates you can imagine,” he said.
Mark Cavanaugh with his mother, Jennifer, in front of the Artemis I Orion spacecraft following the thermal vacuum test at the Space Environments Complex at NASA’s Neil Armstrong Test Facility in Sandusky, Ohio. Cavanaugh says collaboration and empathy were key to solving challenges along the way. “I’ve learned to look at things from the other person’s perspective,” he said. “We’re all working toward the same incredible goal, even if we don’t always agree. That mindset helps keep things constructive and prevents misunderstandings.”
He also emphasizes the importance of creative problem-solving. “For me, overcoming technical challenges comes down to seeking different perspectives, questioning assumptions, and not being afraid to try something new—even if it sounds a little ridiculous at first.”
Mark Cavanaugh riding his motorcycle on the Circuit of the Americas track in Austin, Texas. Outside of work, Cavanaugh fuels his love of speed and precision by riding one of his three motorcycles. He has even taken laps at the Circuit of the Americas track in Austin, Texas.
When he is not on the track or in the control room, Cavanaugh gives back through student outreach. “The thing I always stress when I talk to students is that nothing is impossible,” he said. “I never thought I’d get to work in the space industry, let alone at NASA. But I stayed open to opportunities—even the ones that didn’t match what I originally imagined for myself.”
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By NASA
Keith Barr was born only months before the historic Apollo 11 landing in 1969. While he was too young to witness that giant leap for mankind, the moment sparked a lifelong fascination that set him on a path to design technology that will carry astronauts farther into space than ever before.
Today, Barr serves as a chief engineer and Orion Docking Lidar Field Test lead at NASA’s Johnson Space Center in Houston. He spearheads the field testing of docking lidars for the Orion spacecraft, which will carry astronauts to the Moon on the Artemis III mission. These lidars are critical to enabling Orion to autonomously dock with the human landing system on Artemis III — the mission that will land astronauts near the Moon’s South Pole for the first time in history.
Keith Barr prepares for a wind lidar test flight in one of the U.S. Navy’s Twin Otter aircraft in support of the AC-130 Gunship lidar program. “The Mercury, Gemini, and Apollo missions are some of humanity’s greatest technical achievements,” he said. “To be part of the Artemis chapter is a profound honor.”
In recognition of his contributions, Barr was selected as a NASA Space Flight Awareness Honoree in 2025 for his exceptional dedication to astronaut safety and mission success. Established in 1963, NASA’s Space Flight Awareness Program celebrates individuals who play a vital role in supporting human spaceflight. The award is one of the highest honors presented to the agency’s workforce.
With a career spanning over 25 years at Lockheed Martin, Barr is now recognized as a renowned leader in lidar systems—technologies that use laser light to measure distances. He has led numerous lidar deployments and test programs across commercial aviation, wind energy, and military markets.
In 2019, Barr and his team began planning a multi-phase field campaign to validate Orion’s docking lidars under real-world conditions. They repurposed existing hardware, developed a drone-based simulation system, and conducted dynamic testing at Lockheed Martin facilities in Littleton, Colorado, and Santa Cruz, California.
In Littleton, the team conducted two phases of testing at the Space Operations Simulation Center, evaluating performance across distances ranging from 50 meters to docking. At the Santa Cruz facility, they began much farther out at 6,500 meters and tested down to 10 meters, just before the final docking phase.
Of all these efforts, Barr is especially proud of the ingenuity behind the Santa Cruz tests. To simulate a spacecraft docking scenario, he repurposed a lidar pointing gimbal and test trailer from previous projects and designed a drone-based test system with unprecedented accuracy.
“An often-overlooked portion of any field campaign is the measurement and understanding of truth,” he said. “The system I designed allowed us to record lidar and target positions with accuracy never before demonstrated in outdoor docking lidar testing.”
Testing at the Santa Cruz Facility in California often began before sunrise and continued past sunset to complete the full schedule. Here, a drone hovers at the 10-meter station-keeping waypoint as the sun sets in the background. The test stand at the Santa Cruz Facility had once been used for Agena upper stage rockets—a key piece of hardware used during the Gemini program in the 1960s. “We found a Gemini-era sticker on the door of the test bunker—likely from the time of Gemini VIII, the first space docking completed by Neil Armstrong and David Scott,” Barr said. “This really brought it home to me that we are simply part of the continuing story.”
Keith Barr operates a wind lidar during a live fire test in an AC-130 Gunship aircraft. He is seated next to an open door while flying at 18,000 feet over New Mexico in January 2017. Barr spent more than two decades working on WindTracer—a ground-based Doppler wind lidar system used to measure wind speed and turbulence at airports, wind farms, and in atmospheric research.
The transition from WindTracer to Orion presented new challenges. “Moving onto a space program has a steep learning curve, but I have found success in this new arena and I have learned that I can adapt and I shouldn’t be nervous about the unknown,” he said. “Learning new technologies, applications, and skills keeps my career fun and exciting and I look forward to the next giant leap—whatever it is.”
Keith Barr stands beside the Piper Cherokee 6 aircraft during his time as a captain for New England Airlines. Barr’s passion for flight moves in tandem with his pursuit of innovation. Over his career, he has flown over 1.6 million miles on commercial airlines. “I often joke that I’m on my fourth trip to the Moon and back—just in economy class,” he said.
Before specializing in lidar systems, Barr flew as a captain and assistant chief pilot at New England Airlines, operating small aircraft like the Piper Cherokee 6 and the Britten-Norman Islander.
He also worked at the National Center for Atmospheric Research, contributing to several NASA airborne missions aimed at unraveling the science behind global ozone depletion.
Keith Barr boards NASA’s DC-8 aircraft at Ames Research Center in California before heading to Salina, Kansas, to support a 1996 research mission studying how airplane emissions affect clouds and the atmosphere. As Barr reflects on his journey, he hopes to pass along a sense of legacy to the Artemis Generation. “We are in the process of writing the next chapter of human space exploration history, and our actions, successes, and troubles will be studied and analyzed well into the future,” he said. “We all need to consider how our actions will shape history.”
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