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Crossroads to the Future – NASA Stennis Grows into a Model Federal City

NASA’s Stennis Space Center is widely known for rocket propulsion testing, especially to support the NASA Artemis program to send astronauts to the Moon to prepare for future human exploration of Mars.

What may not be so widely known is that the site also is a unique federal city, home to more than 50 federal, state, academic, and commercial tenants and serving as both a model of government efficiency and a powerful economic engine for its region.

“NASA Stennis is a remarkable story of vision and innovation,” Center Director John Bailey said. “That was the case 55 years ago when the NASA Stennis federal city was born, and it remains the case today as we collaborate and grow to meet the needs of a changing aerospace world.”

Apollo Years

Nearly four years after its first Saturn V stage test, NASA’s Stennis Space Center faced a crossroads to the future. Indeed, despite its frontline role in supporting NASA’s Apollo lunar effort, it was not at all certain a viable future awaited the young rocket propulsion test site.

In 1961, NASA announced plans to build a sprawling propulsion test site in south Mississippi to support Apollo missions to the Moon. The news was a significant development for the sparsely populated Gulf Coast area.  

The new site, located near Bay St. Louis, Mississippi, conducted its first hot fire of a Saturn V rocket stage in April 1966. Saturn V testing progressed steadily during the next years. In fall 1969, however, NASA announced an end to Apollo-related testing, leading to an existential crisis for the young test site.

What was to become of NASA Stennis?

An Expanded Vision

Some observers speculated the location would close or be reduced to caretaker status, with minimal staffing. Either scenario would deliver a serious blow to the families who had re-located to make way for the site and the local communities who had heavily invested in municipal projects to support the influx of workforce personnel.

Such outcomes also would run counter to assurances provided by leaders that the new test site would benefit its surrounding region and involve area residents in “something great.”

For NASA Stennis manager Jackson Balch and others, such a result was unacceptable. Anticipating the crisis, Balch had been working behind the scenes to communicate – and realize – the vision of a multiagency site supporting a range of scientific and technological tenants and missions.

A Pivotal Year

The months following the Saturn V testing announcement were filled with discussions and planning to ensure the future of NASA Stennis. The efforts began to come to fruition in 1970 with key developments:

• In early 1970, NASA Administrator Thomas Paine proposed locating a regional environmental center at NASA Stennis. U.S. Sen. John C. Stennis (Mississippi) responded with a message of the president, “urgently requesting” that a National Earth Resources and Environmental Data Program be established at the site.
• In May 1970, President Richard Nixon offered assurances that an Earth Resources Laboratory would be established at NASA Stennis and that at least two agencies are preparing to locate operations at the site.
• U.S. congressional leaders earmarked $10 million to enable the location of an Earth Resources Laboratory at NASA Stennis.
• On July 9, 1970, the U.S. Coast Guard’s National Data Buoy Project (now the National Data Buoy Center) announced it was relocating to NASA Stennis, making it the first federal city tenant. The project arrived onsite two months later on September 9.
• On Sept. 9, 1970, NASA officially announced establishment of an Earth Resources Laboratory at NASA Stennis.

Time to Grow

By the end of 1970, Balch’s vision was taking shape, but it needed time to grow. The final Saturn V test had been conducted in October – with no new campaign scheduled.

A possibility was on the horizon, however. NASA was building a reusable space shuttle vehicle. It would be powered by the most sophisticated rocket engine ever designed – and the agency needed a place to conduct developmental and flight testing expected to last for decades.

Three sites vied for the assignment. Following presentations and evaluations, NASA announced its selection on March 1, 1971. Space shuttle engine testing would be conducted at NASA Stennis, providing time for the location to grow.

A Collaborative Model

By the spring of 1973, preparations for the space shuttle test campaign were progressing and NASA Stennis was on its way to realizing the federal city vision. Sixteen agencies and universities were now located at NASA Stennis.

The resident tenants followed a shared model in which they shared in the cost of basic site services, such as medical, security, and fire protection. The shared model freed up more funding for the tenants to apply towards innovation and assigned mission work. It was a model of government collaboration and efficiency.

As the site grew, leaders then began to call for it to be granted independent status within NASA, a development not long in coming. On June 14, 1974, just more than a decade after site construction began, NASA Administrator James Fletcher announced the south Mississippi location would be renamed National Space Technology Laboratories and would enjoy equal, independent status alongside other NASA centers.

“Something Great”

For NASA Stennis leaders and supporters, independent status represented a milestone moment in their effort to ensure NASA Stennis delivered on its promise of greatness.

There still were many developments to come, including the first space shuttle main engine test and the subsequent 34-year test campaign, the arrival and growth of the U.S. Navy into the predominant resident presence onsite, the renaming of the center to NASA Stennis, and the continued growth of the federal city.

No one could have imagined it all at the time. However, even in this period of early development, one thing was clear – the future lay ahead, and NASA Stennis was on its way.

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Launch Your Name Around Moon in 2026 on NASA’s Artemis II Mission 

Lee este comunicado de prensa en español aquí.

NASA is inviting the public to join the agency’s Artemis II test flight as four astronauts venture around the Moon and back to test systems and hardware needed for deep space exploration. As part of the agency’s “Send Your Name with Artemis II” effort, anyone can claim their spot by signing up before Jan. 21.
 
Participants will launch their name aboard the Orion spacecraft and SLS (Space Launch System) rocket alongside NASA astronauts Reid Wiseman, Victor Glover, Christina Koch, and CSA (Canadian Space Agency) astronaut Jeremy Hansen.
 
“Artemis II is a key test flight in our effort to return humans to the Moon’s surface and build toward future missions to Mars, and it’s also an opportunity to inspire people across the globe and to give them an opportunity to follow along as we lead the way in human exploration deeper into space,” said Lori Glaze, acting associate administrator, Exploration Systems Development Mission Directorate at NASA Headquarters in Washington. 
 
The collected names will be put on an SD card loaded aboard Orion before launch. In return, participants can download a boarding pass with their name on it as a collectable.
 
To add your name and receive an English-language boarding pass, visit: 

https://go.nasa.gov/artemisnames
 

To add your name and receive a Spanish-language boarding pass, visit: 

https://go.nasa.gov/TuNombreArtemis

 
As part of a Golden Age of innovation and exploration, the approximately 10-day Artemis II test flight, launching no later than April 2026, is the first crewed flight under NASA’s Artemis campaign. It is another step toward new U.S.-crewed missions on the Moon’s surface that will help the agency prepare to send the first astronauts – Americans – to Mars.
 
To learn more about the mission visit:

 
https://www.nasa.gov/mission/artemis-ii/
 
-end-

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

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Lauren E. Low

NASA Stennis Provides Ideal Location for Range of Site Tenants

If location, location, location is the overarching mantra in real estate, it is small wonder that NASA’s Stennis Space Center is considered a national asset and prime aerospace and technology operations site.

It has long stood as a premier – and the nation’s largest – rocket propulsion test site. With unparalleled test infrastructure and expertise, NASA Stennis has helped power the nation’s human space exploration for almost 60 years. It continues to do so, testing systems and engines for NASA’s Artemis program to send astronauts to the Moon to prepare for future human exploration of Mars.

In addition, NASA Stennis is the choice location for a range of agencies, organizations, offices, and companies, all of whom readily attest to the values of the setting. Ask resident tenants to note the value of their NASA Stennis location, and one hears terms like “strategic advantages,” “ideal location,” “local expertise and experience,” “collaborative opportunities,” “hub of innovation,” and “valuable security buffer.”

For the NASA Shared Services Center, its location at the south Mississippi test site provides “substantial strategic advantages” that helps the NSSC maximize its work and provide streamlined business operations for the agency.

Likewise, NASA Stennis provides an ideal location for the North Gulf Institute operated by Mississippi State University, as it conducts frontline work in hurricane forecasting, modeling and assessment, as well as fishery and ecosystem management. The location is strengthened further by the proximity to collaborative partners like the Naval Meteorology and Oceanography Command and the National Data Buoy Center.

The same holds true for the National Centers for Environmental Information operated by the National Oceanic and Atmospheric Administration. A spokesperson said the centers’ mission success is “firmly rooted in its strategic co-location with other federal partners,” including the Naval Meteorology and Oceanography Command, the National Data Buoy Center, and the Northern Gulf Institute.

For Relativity Space, the largest NASA Stennis test complex tenant, the “unparalleled infrastructure” at NASA Stennis has been key to enabling the company’s rocket engine testing. “NASA’s Stennis Space Center plays a vital role in getting Terran R to space,” said Clay Walker, vice president of test and launch for Relativity Space. “The infrastructure here allows us to test high-performance engines in ways no other place can.”

Other companies express similar sentiments, citing the unique opportunities NASA Stennis provides, as well as the value of the local workforce. For instance, L3Harris Technologies has operated at NASA Stennis under various names since the 1960s, providing support to the Apollo, Space Shuttle, and, now, Artemis programs. In 2008, Lockheed Martin opened a start-to-finish facility for production of propulsion systems, making use of the various NASA Stennis propulsion test services and resources.

Evolution Space is capitalizing on decades of aerospace experience at NASA Stennis, as well as “world-class” site infrastructure to establish production and test capabilities for solid rocket motors onsite.

Both Mississippi and Louisiana have established technology offices onsite. As a Mississippi Enterprise for Technology statement noted, “The NASA Stennis environment enhances our ability to support emerging technologies, strengthen Mississippi’s technology ecosystem, and contribute to the economic vitality of the region,” said Davis Pace, chief executive officer for the Mississippi Enterprise for Technology.

Meanwhile, the site’s most prominent tenant – the U.S. Navy – operates various offices at NASA Stennis. The Navy’s move to the site began in the 1970s to take advantage of the security provided by the surrounding NASA Stennis acoustical buffer zone. Various Navy functions eventually located continuing operations onsite, including the Naval Meteorology and Oceanography Command, the Naval Oceanographic Office, the Naval Small Craft Instruction and Technical Training School, the Navy Office of Civilian Human Resources, and the Naval Research Laboratory.

In similar fashion, the U.S. Department of Homeland Security credits the “high-quality, secure, and resilient” NASA Stennis site for its decision to location information technology and applications operations onsite.

As the very first NASA Stennis federal city tenant, arriving onsite in September 1970, the National Data Buoy Center has borne witness to it all.

“From its inception, Sen. John Stennis (and other leaders) envisioned a place where America would push the boundaries of the unknown – from the depths of the oceans to the far reaches of space,” said Dr. William Burnett, director of the National Data Buoy Center onsite. “That vision lives on at NASA Stennis, now home to one of the world’s largest concentrations of oceanographers. At the National Data Buoy Center, we proudly carry out our mission to safeguard maritime safety by harnessing the full strength of this unique scientific and technical community.

“We are deeply rooted in the community and grateful to thrive within the collaborative spirit that defines Stennis. It’s an honor to be part of its legacy – and its future.”

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Life After Microgravity: Astronauts Reflect on Post-Flight Recovery 

Space changes you. It strengthens some muscles, weakens others, shifts fluids within your body, and realigns your sense of balance. NASA’s Human Research Program works to understand—and sometimes even counter—those changes so astronauts can thrive on future deep space missions.  

Astronauts aboard the International Space Station work out roughly two hours a day to protect bone density, muscle strength and the cardiovascular system, but the longer they are in microgravity, the harder it can be for the brain and body to readapt to gravity’s pull. After months in orbit, returning astronauts often describe Earth as heavy, loud, and strangely still. Some reacclimate within days, while other astronauts take longer to fully recover.

Adjusting to Gravity  

The crew of NASA’s SpaceX Crew-7 mission— NASA astronaut Jasmin Moghbeli, ESA (European Space Agency) astronaut Andreas Mogensen, JAXA (Japan Aerospace Exploration Agency) astronaut Satoshi Furukawa, and Roscosmos cosmonaut Konstantin Borisov—landed in March 2024 after nearly 200 days in space. One of the first tests volunteer crew members completed was walking with their eyes open and then closed.  

“With eyes closed, it was almost impossible to walk in a straight line,” Mogensen said. In space, vision is the primary way astronauts orient themselves, but back on Earth, the brain must relearn how to use inner-ear balance signals. Moghbeli joked her first attempt at the exercise looked like “a nice tap dance.”   

“I felt very wobbly for the first two days,” Moghbeli said. “My neck was very tired from holding up my head.” She added that, overall, her body readapted to gravity quickly.  

Astronauts each recover on their own timetable and may encounter different challenges. Mogensen said his coordination took time to return. Furukawa noted that he could not look down without feeling nauseated. “Day by day, I recovered and got more stable,” he said. 

NASA astronaut Loral O’Hara returned in April 2024 after 204 days in space. She said she felt almost completely back to normal a week after returning to Earth. O’Hara added that her prior experience as an ocean engineer gave her insight into space missions. “Having those small teams in the field working with a team somewhere else back on shore with more resources is a good analog for the space station and all the missions we’re hoping to do in the future,” she said. 

NASA astronaut Nichole Ayers, who flew her first space mission with NASA’s SpaceX Crew-10, noted that the brain quickly adapts to weightlessness by tuning out the vestibular system, which controls balance. “Then, within days of being back on Earth, it remembers again—it’s amazing how fast the body readjusts,” she said. 

When NASA astronaut Frank Rubio landed in Kazakhstan in September 2023, he had just completed a record 371-day mission—the longest single U.S. spaceflight.  

Rubio said his body adjusted to gravity right away, though his feet and lower back were sore after more than a year without weight on them. Thanks to consistent workouts, Rubio said he felt mostly recovered within a couple of weeks.  

Mentally, extending his mission from six months to a year was a challenge. “It was a mixed emotional roller coaster,” he said, but regular video calls with family kept him grounded. “It was almost overwhelming how much love and support we received.” 

Crew-8 astronauts Matt Dominick, Jeanette Epps, Michael Barratt, and cosmonaut Alexander Grebenkin splashed down in October 2024 after 235 days on station. Dominick found sitting on hard surfaces uncomfortable at first. Epps felt the heaviness of Earth immediately. “You have to move and exercise every day, regardless of how exhausted you feel,” she said.  

Barratt, veteran astronaut and board certified in internal and aerospace medicine, explained that recovery differs for each crew member, and that every return teaches NASA something new. 

Still a Challenge, Even for Space Veterans  

Veteran NASA astronauts Suni Williams and Butch Wilmore returned from a nine-month mission with Crew-9 in early 2025. Despite her extensive spaceflight experience, Williams said re-adapting to gravity can still be tough. “The weight and heaviness of things is surprising,” she said. Like others, she pushed herself to move daily to regain strength and balance.  

NASA astronaut Don Pettit, also a veteran flyer, came home in April 2025 after 220 days on the space station. At 70 years old, he is NASA’s oldest active astronaut—but experience did not make gravity gentler.  During landing, he says he was kept busy, “emptying the contents of my stomach onto the steppes of Kazakhstan.” Microgravity had eased the aches in his joints and muscles, but Earth’s pull brought them back all at once.  

Pettit said his recovery felt similar to earlier missions. “I still feel like a little kid inside,” he said. The hardest part, he explained, isn’t regaining strength in big muscle groups, but retraining the small, often-overlooked muscles unused in space. “It’s a learning process to get used to gravity again.”  

Recovery happens day by day—with help from exercise, support systems, and a little humor. No matter how long an astronaut is in space, every journey back to Earth is unique. 

The Human Research Program help scientists understand how spaceflight environments affect astronaut health and performance and informs strategies to keep crews healthy for future missions to the Moon, Mars, and beyond. The program studies astronauts before, during, and after spaceflight to learn how the human body adapts to living and working in space. It also collects data through Earth-based analog missions that can help keep astronauts safer for future space exploration.  

To learn more about how microgravity affects the human body and develop new ways to help astronauts stay healthy, for example, its scientists conduct bedrest studies – asking dozens of volunteers to spend 60 days in bed with their heads tilted down at a specific angle.  Lying in this position tricks the body into responding as it would if the body was in space which allows scientists to trial interventions to hopefully counter some of microgravity’s effects.  Such studies, through led by NASA, occur at the German Aerospace Center’s Cologne campus at a facility called :envihab – a combination of “environment” and “habitat.”  

Additional Earth-based insights come from the Crew Health and Performance Exploration Analog (CHAPEA) and the Human Exploration Research Analog (HERA) at NASA’s Johnson Space Center in Houston. Both analogs recreate the remote conditions and scenarios of deep space exploration here on Earth with volunteer crews who agree to live and work in the isolation of ground-based habitats and endure challenges like delayed communication that simulates the type of interactions that will occur during deep space journeys to and from Mars. Findings from these ground-based missions and others will help NASA refine its future interventions, strategies, and protocols for astronauts in space. 

NASA and its partners have supported humans continuously living and working in space since November 2000. After nearly 25 years of continuous human presence, the space station remains the sole space-based proving ground for training and research for deep space missions, enabling NASA’s Artemis campaign, lunar exploration, and future Mars missions. 

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