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Out of Whack Planetary System Offers Clues to a Disturbed Past
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By NASA
NASA’s Human Landing System (HLS) will transport the next astronauts that land on the Moon, including the first woman and first person of color, beginning with Artemis III. For safety and mission success, the landers and other equipment in development for NASA’s Artemis campaign must work reliably in the harshest of environments.
The Hub for Innovative Thermal Technology Maturation and Prototyping (HI-TTeMP) lab at NASA’s Marshall Space Flight Center in Huntsville, Alabama, provides engineers with thermal analysis of materials that may be a prototype or in an early developmental stage using a vacuum chamber, back left, and a conduction chamber, right. NASA/Ken Hall Engineers at NASA’s Marshall Space Flight Center in Huntsville, Alabama, are currently testing how well prototype insulation for SpaceX’s Starship HLS will insulate interior environments, including propellant storage tanks and the crew cabin. Starship HLS will land astronauts on the lunar surface during Artemis III and Artemis IV.
Marshall’s Hub for Innovative Thermal Technology Maturation and Prototyping (HI-TTeMP) laboratory provides the resources and tools for an early, quick-check evaluation of insulation materials destined for Artemis deep space missions.
“Marshall’s HI-TTeMP lab gives us a key testing capability to help determine how well the current materials being designed for vehicles like SpaceX’s orbital propellant storage depot and Starship HLS, will insulate the liquid oxygen and methane propellants,” said HLS chief engineer Rene Ortega. “By using this lab and the expertise provided by the thermal engineers at Marshall, we are gaining valuable feedback earlier in the design and development process that will provide additional information before qualifying hardware for deep space missions.”
A peek inside the conductive test chamber at NASA Marshall’s HI-TTeMP lab where thermal engineers design, set up, execute, and analyze materials destined for deep space to better understand how they will perform in the cold near-vacuum of space. NASA/Ken Hall On the Moon, spaceflight hardware like Starship HLS will face extreme temperatures. On the Moon’s south pole during lunar night, temperatures can plummet to -370 degrees Fahrenheit (-223 degrees Celsius). Elsewhere in deep space temperatures can range from roughly 250 degrees Fahrenheit (120 degrees Celsius) in direct sunlight to just above absolute zero in the shadows.
There are two primary means of managing thermal conditions: active and passive. Passive thermal controls include materials such as insulation, white paint, thermal blankets, and reflective metals. Engineers can also design operational controls, such as pointing thermally sensitive areas of a spacecraft away from direct sunlight, to help manage extreme thermal conditions. Active thermal control measures that could be used include radiators or cryogenic coolers.
Engineers use two vacuum test chambers in the lab to simulate the heat transfer effects of the deep space environment and to evaluate the thermal properties of the materials. One chamber is used to understand radiant heat, which directly warms an object in its path, such as when heat from the Sun shines on it. The other test chamber evaluates conduction by isolating and measuring its heat transfer paths.
NASA engineers working in the HI-TTeMP lab not only design, set up, and run tests, they also provide insight and expertise in thermal engineering to assist NASA’s industry partners, such as SpaceX and other organizations, in validating concepts and models, or suggesting changes to designs. The lab is able to rapidly test and evaluate design updates or iterations.
NASA’s HLS Program, managed by NASA Marshall, is charged with safely landing astronauts on the Moon as part of Artemis. NASA has awarded contracts to SpaceX for landing services for Artemis III and IV and to Blue Origin for Artemis V. Both landing services providers plan to transfer super-cold propellant in space to send landers to the Moon with full tanks.
With Artemis, NASA will explore more of the Moon than ever before, learn how to live and work away from home, and prepare for future human exploration of Mars. NASA’s SLS (Space Launch System) rocket, exploration ground systems, and Orion spacecraft, along with the HLS, next-generation spacesuits, Gateway lunar space station, and future rovers are NASA’s foundation for deep space exploration.
For more on HLS, visit:
https://www.nasa.gov/humans-in-space/human-landing-system
News Media Contact
Corinne Beckinger
Marshall Space Flight Center, Huntsville, Ala.
256.544.0034
corinne.m.beckinger@nasa.gov
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By NASA
In the unforgiving lunar environment, the possibility of an astronaut crewmember becoming incapacitated due to unforeseen circumstances (injury, medical emergency, or a mission-related accident) is a critical concern, starting with the upcoming Artemis III mission, where two astronaut crewmembers will explore the Lunar South Pole. The Moon’s surface is littered with rocks ranging from 0.15 to 20 meters in diameter and craters spanning 1 to 30 meters wide, making navigation challenging even under optimal conditions. The low gravity, unique lighting conditions, extreme temperatures, and availability of only one person to perform the rescue, further complicate any rescue efforts. Among the critical concerns is the safety of astronauts during Extravehicular Activities (EVAs). If an astronaut crewmember becomes incapacitated during a mission, the ability to return them safely and promptly to the human landing system is essential. A single crew member should be able to transport an incapacitated crew member distances up to 2 km and a slope of up to 20 degrees on the lunar terrain without the assistance of a lunar rover. This pressing issue opens the door for innovative solutions. We are looking for a cutting-edge design that is low in mass and easy to deploy, enabling one astronaut crewmember to safely transport their suited (343 kg (~755lb)) and fully incapacitated partner back to the human landing system. The solution must perform effectively in the Moon’s extreme South Pole environment and operate independently of a lunar rover. Your creativity and expertise could bridge this critical gap, enhancing the safety measures for future lunar explorers. By addressing this challenge, you have the opportunity to contribute to the next “giant leap” in human space exploration.
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For more information, visit: https://www.herox.com/NASASouthPoleSafety
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By NASA
4 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
Note: The following article is part of a series highlighting propulsion testing at NASA’s Stennis Space Center. To access the entire series, please visit: https://www.nasa.gov/feature/propulsion-powering-space-dreams/.
An aerial image from 1965 shows the dual flame trenches of the Thad Cochran Test Stand (B-1/B-2) under construction at NASA’s Stennis Space Center (then known as Mississippi Test Operations) taking shape.NASA/Stennis Since the United States sent the first humans to the Moon more than 60 years ago, NASA’s Stennis Space Center near Bay St. Louis, Mississippi, has answered the call to help power the nation’s space dreams.
“History shows NASA Stennis is the country’s premier rocket engine test site and the go-to place for propulsion testing,” NASA Stennis Director John Bailey said. “It started with Apollo and continued through space shuttle. Now, we are going back to the Moon and beyond with Artemis – and it all comes through NASA Stennis.”
As the nation raced to send the first humans to the Moon, NASA selected a remote location in Hancock County, Mississippi, in October 1961 to test the needed rocket stages. Thanks to a massive construction project, the site conducted its first Saturn V rocket stage test in April 1966. In the next four-plus years, NASA Stennis tested 27 Saturn V stages, including those that launched 12 astronauts to walk on the Moon.
“Talking to people working here during those years, you hear how much they believed in the mission,” said Joe Schuyler, director of the NASA Stennis Engineering and Test Directorate. “Their hard work helped America reach the Moon and showed us the possibilities for NASA Stennis.”
Construction workers bring down a tree during the early days of construction for NASA’s Stennis Space Center. Tree-cutting to start what was the largest construction project in Mississippi – and one of the largest in the United States – at the time began May 17, 1963.NASA/Stennis NASA Stennis (then known as the Mississippi Test Facility) conducts its first-ever test firing – a 15-second hot fire of the Saturn V S-II-C second stage prototype – on the A-2 Test Stand on April 23, 1966.NASA/Stennis An aerial image from early 1967 shows the completed A-2 Test Stand in the foreground and the Thad Cochran Test Stand (B-1/B-2) in the background at NASA’s Stennis Space Center, then known as the Mississippi Test Facility.NASA/Stennis NASA officials view the first space shuttle main engine test on the Fred Haise Test Stand (formerly the A-1 Test Stand) at NASA’s Stennis Space Center (then known as National Space Technology Laboratories) on May 19, 1975.NASA/Stennis A 1979 image offers a close-up view of a space shuttle main propulsion test article hot fire on the B-2 side of the Thad Cochran Test Stand at NASA’s Stennis Space Center (then known as National Space Technology Laboratories). Main propulsion test article testing involved installing a shuttle fuel tank, a mockup of the shuttle orbiter and the vehicle’s three-engine configuration on the stand, then firing all three engines simultaneously, as would be done during an actual launch.NASA/Stennis As Apollo missions neared an end, plans were underway to drastically reduce the NASA Stennis footprint. Enter the space shuttle. NASA considered three locations to test engines for its new reusable vehicle before selecting NASA Stennis on March 1, 1970, ensuring the center’s future for the next several decades.
Space shuttle main engine testing proved challenging as the site transitioned from handling full rocket stages to firing single engines. “A big part of the challenge was the fact that teams were testing an entire engine from the very start,” NASA Test Operations Chief Maury Vander said. “Typically, you begin testing components, then progress to a full engine. Teams had a lot to learn in real time.”
NASA Stennis teams also tested the shuttle Main Propulsion Test Article with three engines firing simultaneously. The testing was particularly critical given the first shuttle mission would carry astronauts.
NASA Stennis teams worked diligently to demonstrate the shuttle system would operate safely, an effort characterized as one of the site’s finest hours. Following the first shuttle mission in 1981, astronauts Robert Crippen and John Young visited the south Mississippi site. “The effort that you contributed made it possible for us to sit back and ride,” Crippen told NASA Stennis employees.
From 1975 to 2009, NASA Stennis tested every main engine to help power 135 shuttle missions that enabled historic missions, such as those that deployed and repaired the Hubble Space Telescope and assembled the International Space Station, enabling its many scientific experiments and spinoff technologies. The site also tested every engine and component upgrade and helped troubleshoot performance issues. It led test campaigns following shuttle accidents to help ensure safe returns to flight. In total, the site conducted 2,307 tests for 820,475.68 seconds of accumulated hot fire.
NASA conducts the final test of a space shuttle main engine on the A-2 Test Stand at NASA’s Stennis Space Center on July 29, 2009. The Space Shuttle Program concluded two years later with the STS-135 shuttle mission. NASA / Stennis An on-stand camera offers a closeup view of the first test of an RS-25 engine on the Fred Haise Test Stand (formerly the A-1 Test Stand) at NASA’s Stennis Space Center on Jan. 9, 2015. RS-25 engines power the core stage of NASA’s powerful SLS (Space Launch System) rocket.NASA/Stennis Crews at NASA’s Stennis Space Center install the first core stage of NASA’s powerful SLS (Space Launch System) on the B-2 side of the Thad Cochran Test Stand on Jan. 21-22, 2020. Following testing, the stage would help launch the Artemis I mission in November 2022.NASA/Stennis NASA conducts a full-duration RS-25 hot fire April 3, 2024, on the Fred Haise Test Stand at NASA’s Stennis Space Center, achieving a major milestone for future Artemis flights of NASA’s SLS (Space Launch System) rocket. It marked the final hot fire of a 12-test series to certify production of new RS-25 engines by lead contractor L3Harris (formerly known as Aerojet Rocketdyne) to help power NASA’s SLS rocket on Artemis missions to the Moon and beyond, beginning with Artemis V.NASA/Stennis Even as NASA Stennis tested main engines to power shuttle missions, the site led in testing next-generation engines, including the Fastrac, XRS-2200 linear aerospike, and J-2X. It also developed its E Test Complex, with multiple test stands and cells, to support a range of component and engine test projects, including those of commercial aerospace companies.
A landmark agreement between NASA Stennis and Aerojet Rocketdyne (now known as L3Harris) in 1998 marked the site’s first test partnership with such a company. “That was the starting point,” said Vander. “Today, we are a preferred partner for multiple companies and test projects, large and small.”
NASA Stennis also is testing RS-25 engines and related systems to help power NASA’s SLS (Space Launch System) rocket on Artemis missions to the Moon. When the agency travels to Mars, it is expected the missions will launch with engines tested at the Mississippi site as well.
“The Gulf Coast of Mississippi helped achieve our space dreams of the past, and NASA Stennis continues supporting today’s dreams,” Bailey said. “It is a true testament to the expertise and dedication of our entire team and the incredible support of surrounding communities and the whole state.”
For information about NASA’s Stennis Space Center, visit:
Stennis Space Center – NASA
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Last Updated Nov 13, 2024 EditorNASA Stennis CommunicationsContactC. Lacy Thompsoncalvin.l.thompson@nasa.gov / (228) 688-3333LocationStennis Space Center Related Terms
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By NASA
Creating a golden streak in the night sky, a SpaceX Falcon 9 rocket soars upward after liftoff from Launch Complex 39A at NASA’s Kennedy Space Center in Florida on March 14, 2023, on the company’s 27th Commercial Resupply Services mission for the agency to the International Space Station. SpaceX NASA invites the public to participate in virtual activities ahead of the launch of SpaceX’s 31st commercial resupply services mission for the agency. NASA and SpaceX are targeting 9:29 p.m. EST Monday, Nov. 4, for the SpaceX Dragon spacecraft to launch on the company’s Falcon 9 rocket from Launch Complex 39A at NASA’s Kennedy Space Center in Florida.
In addition to food, supplies, and equipment for the crew, Dragon will deliver several new experiments, including the COronal Diagnostic EXperiment to examine solar wind and how it forms, as well as Antarctic moss to observe the combined effects of cosmic radiation and microgravity on plants. Other investigations aboard include a device to test cold welding of metals in microgravity and an investigation that studies how space impacts different materials
Members of the public can register to attend the launch virtually. As a virtual guest, you’ll gain access to curated resources, interactive opportunities, and mission-specific information delivered straight to your inbox. Following liftoff, virtual guests will receive a commemorative stamp for their virtual guest passport
Learn more about NASA research and activities on the International Space Station at:
https://www.nasa.gov/station
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