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    • By NASA
      3 min read
      Preparations for Next Moonwalk Simulations Underway (and Underwater)
      The Lunar Environment Structural Test Rig simulates the intense cold of the lunar night, ranging from 40 Kelvin (K) to 125 K while maintaining a vacuum environment. This creates a tool by which scientists and engineers can test materials, electronics, and flight hardware for future Moon and Mars missions, characterizing their behaviors at these temperatures while also validating their ability to meet design requirements.
      Cryogenic engineer Adam Rice tests the Lunar Environment Structural Test Rig to simulate the thermal-vacuum conditions of the lunar night on Thursday, May 22, 2025.NASA/Jef Janis Facility Overview
      The Lunar Environment Structural Test Rig (LESTR) approaches the problem of creating a simulated lunar environment by departing from typical fluid immersion or jacketed-and-chilled chamber systems. It does this by using a cryocooler to reject heat and bring the test section to any point desired by the test engineer, as low as 40 K or as high as 125 K in a vacuum environment. By combining high vacuum and cryogenic temperatures, LESTR enables safe, accurate, and cost-effective testing of materials and hardware destined for the Moon and beyond. Its modular setup supports a wide range of components — from spacesuits to rover wheels to electronics — while laying the foundation for future Moon and Mars mission technologies.
      Quick Facts
      LESTR is a cryogenic mechanical test system built up within a conventional load frame with the goal of providing a tool to simulate the thermal-vacuum conditions of the lunar night to engineers tasked with creating the materials, tools, and machinery to succeed in NASA’s missions.
      LESTR replicates extreme lunar night environments — including temperatures as low as 40 K and high vacuum (<5×10⁻⁷ Torr) — enabling true-to-space testing without liquid cryogens. Unlike traditional “wet” methods, LESTR uses a cryocooler and vacuum system to create an environment accurate to the lunar surface. From rover wheels to spacesuits to electronics, LESTR supports static and dynamic testing across a wide range of Moon and Mars mission hardware. With scalable architecture and precision thermal control, LESTR lays critical groundwork for advancing the technologies of NASA’s Artemis missions and beyond. Capabilities
      Specifications
      Temperature Range: 40 K to 125 K Load Capacity: ~10 kN Vacuum Level: <5×10⁻⁷ Torr Test Volume (Cold Box Dimensions): 7.5 by 9.5 by 11.5 inches Maximum Cycle Rate: 100 Hz Time to Vacuum:10⁻⁵ Torr in less than one hour 10⁻⁶ Torr in four hours Features
      Dry cryogenic testing (no fluid cryogen immersion) “Dial-a-temperature” control for precise thermal conditions Integrated optical extensometer for strain imaging Digital image correlation and electrical feedthroughs support a variety of data collection methods Native support for high-duration cyclic testing Applications
      Cryogenic Lifecycle Testing: fatigue, fracture, and durability assessments Low-Frequency Vibration Testing: electronics qualification for mobility systems Static Load Testing: material behavior characterization in lunar-like environments Suspension and Drivetrain Testing: shock absorbers, wheels, springs, and textiles Textiles Testing: evaluation of spacesuits and habitat fabrics Dynamic Load Testing: up to 10 kN linear capacity, 60 mm stroke Contact
      Cryogenic and Mechanical Evaluation Lab Manager: Andrew Ring
      216-433-9623
      Andrew.J.Ring@nasa.gov
      LESTR Technical Lead: Ariel Dimston
      216-433-2893
      Ariel.E.Dimston@nasa.gov
      Using Our Facilities
      NASA’s Glenn Research Center in Cleveland provides ground test facilities to industry, government, and academia. If you are considering testing in one of our facilities or would like further information about a specific facility or capability, please let us know.
      Gallery
      The Lunar Environment Structural Test Rig simulates the intense cold of the lunar night on Friday, June 6, 2025.NASA/Steven Logan The Lunar Environment Structural Test Rig uses a cryocooler to reject heat and bring the test section as low as 40 Kelvin in a vacuum environment on Thursday, May 22, 2025.NASA/Jef Janis Keep Exploring Discover More Topics From NASA
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    • By Space Force
      The U.S. Air Force and Space Force held its first National Signing Day ceremony at the historic Rayburn House Office building, Aug. 15. 

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    • By NASA
      2 min read
      Preparations for Next Moonwalk Simulations Underway (and Underwater)
      NASA’s X-59 quiet supersonic research aircraft sits on the ramp at sunrise before ground tests at Lockheed Martin’s Skunk Works facility in Palmdale, California, on July 18, 2025. The X-59 is the centerpiece of NASA’s Quesst mission to demonstrate quiet supersonic flight and the aircraft is scheduled to make its first flight later this year.Lockheed Martin Corporation As we honor the legacy of aviation pioneers this National Aviation Day, NASA’s X-59 is preparing to push the boundaries of what’s possible in air travel. The quiet supersonic aircraft’s historic first flight is on the horizon, with final ground tests about to begin.
      Following completion of low-speed taxi tests in July 2025 in Palmdale, California, medium- and high-speed taxi tests mark the final steps before the aircraft takes to the skies for the first time. The taxi tests will focus on how the aircraft handles at higher ground speeds, including braking, steering, stability, and sensor performance. The X-59 team will also assess how well the visibility systems work since the cockpit has no forward-facing window.
      The X-59’s initial flight will kick off a first phase of flight testing focused on verifying the aircraft’s airworthiness and safety. The X-59 will reach speeds of approximately 240 mph at an altitude of about 12,000 feet. The roughly one-hour flight will depart from Palmdale and land at NASA’s Armstrong Flight Research Center in Edwards, California.
      During the flight, the X-59 team will evaluate several critical systems, including engine performance, stabilization, instrumentation, autopilot, control systems, and air data performance. These checks will ensure the aircraft is ready for future flight tests, where it will fly faster and higher to evaluate performance and safety, ultimately leading to future phases of the mission.
      The X-59 is the centerpiece of NASA’s Quesst mission, which aims to demonstrate quiet supersonic flight by reducing the loud sonic boom to a quieter “thump.” Proving the X-plane’s airworthiness is the first step on the path to gathering data in support of the mission. The flight data will help inform U.S. and international regulators as they consider new noise standards for supersonic commercial flight over land. 
      NASA test pilot Nils Larson lowers the canopy of the X-59 quiet supersonic research aircraft during ground tests at Lockheed Martin’s Skunk Works facility in Palmdale, California, on July 18, 2025. The X-59 is the centerpiece of NASA’s Quesst mission to demonstrate quiet supersonic flight and the aircraft is scheduled to make its first flight later this year.Lockheed Martin Corporation Share
      Details
      Last Updated Aug 19, 2025 EditorDede DiniusContactAmber Philman-Blair Related Terms
      Advanced Air Vehicles Program Aeronautics Aeronautics Research Mission Directorate Ames Research Center Armstrong Flight Research Center Glenn Research Center Langley Research Center Low Boom Flight Demonstrator Quesst (X-59) Supersonic Flight Explore More
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    • By NASA
      NASA's SpaceX Crew-10 Post-Flight News Conference
    • By NASA
      Tess Caswell supports the International Space Station from NASA’s Johnson Space Center in Houston as a capsule communicator, or capcom, as well as through the Extravehicular Activity Office. She is currently on rotation as the Artemis lead capcom, helping to develop training and processes for the Artemis campaign by leveraging her experience supporting the space station.  
      She helps ensure that astronauts aboard the spacecraft receive the right information at the right time. This role involves a range of activities, from learning the language of the spacecraft and its onboard operations to participating in simulations to relay critical information to the crew, especially during dynamic operations or when things go wrong.  
      Read on to learn more about Tess! 
      Tess Caswell serves as lead capsule communicator, or capcom, in the Mission Control Center in Houston for the arrival of NASA’s SpaceX Crew-10 to the International Space Station. NASA/Robert Markowitz Where are you from? 
      Soldotna, Alaska. 
      How would you describe your job to family or friends that may not be familiar with NASA? 
      Capcoms are the people who speak to the astronauts on behalf of Mission Control, and I am the lead for the team of capcoms who will support missions to the Moon as part of NASA’s Artemis campaign.  
      What advice would you give to young individuals aspiring to work in the space industry or at NASA? 
      Remember that space travel is more than just engineers and scientists. It takes all kinds of people to support astronauts in space, including medicine, food science, communications, photography – you name it!
      Tess Caswell
      Extravehicular Activity Flight Controller and Lead Capsule Communicator 
      I like to encourage young people to think about what part of space travel inspires them. We live in an era where there are many companies leveraging space for different purposes, including tourism, settlement, profit, and exploration. It’s important to think about what aspect of space travel interests you – or use things like internships to figure it out! 
      If you’re excited about space but don’t want to be an engineer, there are still jobs for you. 
      How long have you been working for NASA? 
      Eight years, plus a few internships. 
      What was your path to NASA? 
      Internships and student projects were my path to NASA. As an undergraduate, I worked in a student rocket lab, which gave me firsthand experience building and testing hardware. During the summers, I participated in internships to explore various careers and NASA centers. My final internship led directly to my first job after college as an Environmental and Thermal Operating Systems (ETHOS) flight controller in mission control for the space station. 
      I left NASA for a while to pursue an advanced degree in planetary geology and spent two years working at Blue Origin as the lead flight controller for the New Shepard capsule. Ultimately, though, I am motivated by exploration and chose to return to NASA where that is our focus. I landed in the Extravehicular Activity Office (EVA) within the Flight Operations Directorate after returning from Blue Origin. 
      Tess Caswell suits up in the Extravehicular Mobility Unit at the Neutral Buoyancy Laboratory at NASA’s Sonny Carter Training Facility in Houston during training to become an EVA instructor. NASA/Richie Hindman Is there a space figure you’ve looked up to or someone that inspires you?  
      It’s hard to name a specific figure who inspires me. Instead, it’s the caliber of people overall who work in flight operations at Johnson Space Center. Not just the astronauts, but the folks in mission control, in the backrooms supporting the control center, and on the training teams for astronauts and flight controllers. Every single person demonstrates excellence every day. It inspires me to bring my best self to the table in each and every project. 
      What is your favorite NASA memory or the most meaningful project you’ve worked on during your time with NASA? 
      That is a hard one!  
      My current favorite is probably the day I certified as a capcom for the space station. The first time talking to the crew is both nerve-wracking and exciting. You know the entire space station community stops and listens when you are speaking, but it’s incredibly cool to be privileged with speaking to the crew. So, your first few days are a little scary, but awesome. After I’d been declared certified, the crew called down on Space –to Ground to congratulate me. It was a very special moment. I saved a recording of it! 
      Tess Caswell learns to fly the International Space Station Remote Manipulator System, or Canadarm2, in Canada as part of capcom training. Tess Caswell What do you love sharing about station? 
      The international collaboration required to design, build, and operate the International Space Station is a constant source of inspiration for me.
      Tess Caswell
      Extravehicular Activity Flight Controller and Lead Capsule Communicator 
      When I give folks tours of mission control, I like to point out the photo of the U.S.-built Unity node and the Russian-built Zarya module mated in the shuttle cargo bay. The idea that those two modules were designed and built in different countries, launched in two different vehicles, and connected for the first time in low Earth orbit reminds me of what we can all do when we work together across geopolitical boundaries. The space station brings people together in a common mission that benefits all of us. 
      If you could have dinner with any astronaut, past or present, who would it be? 
      Sally Ride, definitely. 
      Do you have a favorite space-related memory or moment that stands out to you? 
      If I had to choose one, I’d say it was the day a person from NASA visited my elementary school in 1995. I remember being completely captivated by his presentation and dying to ask questions when he came by my classroom later. It’s a favorite memory because it poured fuel on the spark of my early childhood interest in space exploration. It wasn’t the thing that initially piqued my interest, but that visit made the dream feel attainable and set me on the course that has me at NASA today. 
      What are some of the key projects you have worked on during your time at NASA? What have been your favorite? 
      I’ve worked in mission control for the space station as an ETHOS flight controller and, later, as a capcom. I’ve also certified as an EVA task backroom controller and scripted three spacewalks that were performed on the space station. While working in EVA, I also helped design the products and processes that will be used to design moonwalks for Artemis astronauts and how flight control operations will work during dynamic, science-driven spacewalks.  
       Developing an EVA is a huge integration effort, and you get to work with a broad range of perspectives to build a solid plan. Then, the spacewalks themselves were both challenging and rewarding. They didn’t go exactly to plan, but we kept the crew safe and accomplished our primary objectives! 
      I’m fortunate to have had so many cool experiences while working at NASA, and I know there will be many more. 
      Tess Caswell, right, and geoscientist Dr. Kelsey Young, left, conduct night operations in NASA’s Johnson Space Center rock yard, testing EVA techniques to prepare for future lunar missions.NASA/Norah Moran What are your hobbies/things you enjoy doing outside of work? 
      I like to stay active, including trail running, taekwondo, backpacking, and cross-country skiing (which is a bit hard to train for in Houston). I spend as much time as I can flying my Piper J-3 Cub, trying to make myself a better pilot each time I fly. Finally, I read and write fiction to let my imagination wander. 
      Day launch or night launch? 
      Night launch! 
      Favorite space movie? 
      Apollo 13, hands down! 
      NASA Worm or Meatball logo? 
      Worm – elegant and cool! 
      Every day, we are conducting exciting research aboard our orbiting laboratory that will help us explore farther into space and bring benefits back to people on Earth. You can keep up with the latest news, videos, and pictures about space station science on the Station Research & Technology news page. It is a curated hub of space station research digital media from Johnson and other centers and space agencies.  
      Sign up for our weekly email newsletter to get the updates delivered directly to you.  
      Follow updates on social media at @ISS_Research on X, and on the space station accounts on Facebook and Instagram.  
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