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By NASA
5 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
ICON’s next generation Vulcan construction system 3D printing a simulated Mars habitat for NASA’s Crew Health and Performance Exploration Analog (CHAPEA) missions.ICON One of the keys to a sustainable human presence on distant worlds is using local, or in-situ, resources which includes building materials for infrastructure such as habitats, radiation shielding, roads, and rocket launch and landing pads. NASA’s Space Technology Mission Directorate is leveraging its portfolio of programs and industry opportunities to develop in-situ, resource capabilities to help future Moon and Mars explorers build what they need. These technologies have made exciting progress for space applications as well as some impacts right here on Earth.
The Moon to Mars Planetary Autonomous Construction Technology (MMPACT) project, funded by NASA’s Game Changing Development program and managed at the agency’s Marshall Space Flight Center in Huntsville, Alabama, is exploring applications of large-scale, robotic 3D printing technology for construction on other planets. It sounds like the stuff of science fiction, but demonstrations using simulated lunar and Martian surface material, known as regolith, show the concept could become reality.
Lunar 3D printing prototype.Contour Crafting With its partners in industry and academic institutions, MMPACT is developing processing technologies for lunar and Martian construction materials. The binders for these materials, including water, could be extracted from the local regolith to reduce launch mass. The regolith itself is used as the aggregate, or granular material, for these concretes. NASA has evaluated these materials for decades, initially working with large-scale 3D printing pioneer, Dr. Behrokh Khoshnevis, a professor of civil, environmental and astronautical engineering at the University of Southern California in Los Angeles.
Khoshnevis developed techniques for large-scale extraterrestrial 3D printing under the NASA Innovative Advanced Concepts (NIAC) program. One of these processes is Contour Crafting, in which molten regolith and a binding agent are extruded from a nozzle to create infrastructure layer by layer. The process can be used to autonomously build monolithic structures like radiation shielding and rocket landing pads.
Continuing to work with the NIAC program, Khoshnevis also developed a 3D printing method called selective separation sintering, in which heat and pressure are applied to layers of powder to produce metallic, ceramic, or composite objects which could produce small-scale, more-precise hardware. This energy-efficient technique can be used on planetary surfaces as well as in microgravity environments like space stations to produce items including interlocking tiles and replacement parts.
While NASA’s efforts are ultimately aimed at developing technologies capable of building a sustainable human presence on other worlds, Khoshnevis is also setting his sights closer to home. He has created a company called Contour Crafting Corporation that will use 3D printing techniques advanced with NIAC funding to fabricate housing and other infrastructure here on Earth.
Another one of NASA’s partners in additive manufacturing, ICON of Austin, Texas, is doing the same, using 3D printing techniques for home construction on Earth, with robotics, software, and advanced material.
Construction is complete on a 3D-printed, 1,700-square-foot habitat that will simulate the challenges of a mission to Mars at NASA’s Johnson Space Center in Houston, Texas. The habitat will be home to four intrepid crew members for a one-year Crew Health and Performance Analog, or CHAPEA, mission. The first of three missions begins in the summer of 2023. The ICON company was among the participants in NASA’s 3D-Printed Habitat Challenge, which aimed to advance the technology needed to build housing in extraterrestrial environments. In 2021, ICON used its large-scale 3D printing system to build a 1,700 square-foot simulated Martian habitat that includes crew quarters, workstations and common lounge and food preparation areas. This habitat prototype, called Mars Dune Alpha, is part of NASA’s ongoing Crew Health and Performance Exploration Analog, a series of Mars surface mission simulations scheduled through 2026 at NASA’s Johnson Space Center in Houston.
With support from NASA’s Small Business Innovation Research program, ICON is also developing an Olympus construction system, which is designed to use local resources on the Moon and Mars as building materials.
The ICON company uses a robotic 3D printing technique called Laser Vitreous Multi-material Transformation, in which high-powered lasers melt local surface materials, or regolith, that then solidify to form strong, ceramic-like structures. Regolith can similarly be transformed to create infrastructure capable of withstanding environmental hazards like corrosive lunar dust, as well as radiation and temperature extremes.
The company is also characterizing the gravity-dependent properties of simulated lunar regolith in an experiment called Duneflow, which flew aboard a Blue Origin reusable suborbital rocket system through NASA’s Flight Opportunities program in February 2025. During that flight test, the vehicle simulated lunar gravity for approximately two minutes, enabling ICON and researchers from NASA to compare the behavior of simulant against real regolith obtained from the Moon during an Apollo mission.
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Last Updated May 13, 2025 EditorLoura Hall Related Terms
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By NASA
5 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
This picture of Mars is a composite of several images captured by Europa Clipper’s thermal imager on March 1. Bright regions are relatively warm, with temperatures of about 32 degrees Fahrenheit (0 degrees Celsius). Darker areas are colder. The darkest region at the top is the northern polar cap and is about minus 190 F (minus 125 C).NASA/JPL-Caltech/ASU Headed for Jupiter’s moon Europa, the spacecraft did some sightseeing, using a flyby of Mars to calibrate its infrared imaging instrument.
On its recent swing by Mars, NASA’s Europa Clipper took the opportunity to capture infrared images of the Red Planet. The data will help mission scientists calibrate the spacecraft’s thermal imaging instrument so they can be sure it’s operating correctly when Europa Clipper arrives at the Jupiter system in 2030.
The mission’s sights are set on Jupiter’s moon Europa and the global ocean hidden under its icy surface. A year after slipping into orbit around Jupiter, Europa Clipper will begin a series of 49 close flybys of the moon to investigate whether it holds conditions suitable for life.
A key element of that investigation will be thermal imaging — global scans of Europa that map temperatures to shed light on how active the surface is. Infrared imaging will reveal how much heat is being emitted from the moon; warmer areas of the ice give off more energy and indicate recent activity.
The imaging also will tell scientists where the ocean is closest to the surface. Europa is crisscrossed by dramatic ridges and fractures, which scientists believe are caused by ocean convection pulling apart the icy crust and water rising up to fill the gaps.
This picture of Mars is a colorized composite of several images captured by Europa Clipper’s thermal imager. Warm colors represent relatively warm temperatures; red areas are about 32 degrees Fahrenheit (0 degrees Celsius), and purple regions are about minus 190 F (minus 125 C).NASA/JPL-Caltech/ASU “We want to measure the temperature of those features,” said Arizona State University’s Phil Christensen, principal investigator of Europa Clipper’s infrared camera, called the Europa Thermal Imaging System (E-THEMIS). “If Europa is a really active place, those fractures will be warmer than the surrounding ice where the ocean comes close to the surface. Or if water erupted onto the surface hundreds to thousands of years ago, then those surfaces could still be relatively warm.”
Why Mars
On March 1, Europa Clipper flew just 550 miles (884 kilometers) above the surface of Mars in order to use the planet’s gravitational pull to reshape the spacecraft’s trajectory. Ultimately, the assist will get the mission to Jupiter faster than if it made a beeline for the gas giant, but the flyby also offered a critical opportunity for Europa Clipper to test E-THEMIS.
For about 18 minutes on March 1, the instrument captured one image per second, yielding more than a thousand grayscale pictures that were transmitted to Earth starting on May 5. After compiling these images into a global snapshot of Mars, scientists applied color, using hues with familiar associations: Warm areas are depicted in red, while colder areas are shown as blue.
By comparing E-THEMIS images with those made from established Mars data, scientists can judge how well the instrument is working.
“We wanted no surprises in these new images,” Christensen said. “The goal was to capture imagery of a planetary body we know extraordinarily well and make sure the dataset looks exactly the way it should, based on 20 years of instruments documenting Mars.”
NASA’s Mars Odyssey orbiter, launched in 2001, carries a sister instrument named THEMIS that has been capturing its own thermal images of the Red Planet for decades. To be extra thorough, the Odyssey team collected thermal images of Mars before, during, and after Europa Clipper’s flyby so that Europa scientists can compare the visuals as an additional gauge of how well E-THEMIS is calibrated.
Europa Clipper also took advantage of the close proximity to Mars to test all the components of its radar instrument in unison for the first time. The radar antennas and the wavelengths they produce are so long that it wasn’t possible for engineers to can do that in a clean room before launch. The radar data will be returned and analyzed in the coming weeks and months, but preliminary assessments of the real-time telemetry indicate that the test went well.
To leverage the flyby even further, the science team took the opportunity to ensure that the spacecraft’s telecommunication equipment will be able to conduct gravity experiments at Europa. By transmitting signals to Earth while passing through Mars’ gravity field, they were able to confirm that a similar operation is expected to work at Europa.
Europa Clipper launched from NASA’s Kennedy Space Center in Florida on Oct. 14, 2024, via a SpaceX Falcon Heavy, embarking on a 1.8 billion-mile (2.9 billion-kilometer) journey to Jupiter, which is five times farther from the Sun than Earth is. Now that the probe has harnessed the gravity of Mars, its next gravity assist will be from Earth in 2026.
More About Europa Clipper
Europa Clipper’s three main science objectives are to determine the thickness of the moon’s icy shell and its interactions with the ocean below, to investigate its composition, and to characterize its geology. The mission’s detailed exploration of Europa will help scientists better understand the astrobiological potential for habitable worlds beyond our planet.
Managed by Caltech in Pasadena, California, NASA’s Jet Propulsion Laboratory in Southern California leads the development of the Europa Clipper mission in partnership with the Johns Hopkins Applied Physics Laboratory in Laurel, Maryland, for NASA’s Science Mission Directorate in Washington. APL designed the main spacecraft body in collaboration with JPL and NASA’s Goddard Space Flight Center in Greenbelt, Maryland, NASA’s Marshall Space Flight Center in Huntsville, Alabama, and Langley Research Center in Hampton, Virginia. The Planetary Missions Program Office at NASA Marshall executes program management of the Europa Clipper mission. NASA’s Launch Services Program, based at NASA Kennedy, managed the launch service for the Europa Clipper spacecraft.
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Last Updated May 12, 2025 Related Terms
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In a groundbreaking development, advances in quantum data analysis have led to a discovery no scientist could have foreseen. NASA’s deep space monitoring system, upgraded with a quantum processor designed to filter cosmic noise and decode interstellar signals, produced something startling: an image.
A conceptual interpretation of the Voyager 1 image.
But this wasn’t an input, a simulation, or a product of algorithmic imagination. It wasn’t the result of random noise or a misfired pattern recognition process. The quantum system returned a coherent, structured, and symmetrical image, undeniably artificial. And the data it derived from? None other than Voyager 1.
Renowned physicist Michio Kaku addressed the anomaly in a recent interview: “We may be witnessing the first whisper of a new intelligence, something not man-made, not terrestrial, and certainly not random.”
The image, reconstructed via entangled qubit networks, depicted a figure: humanoid in silhouette, yet composed of geometric segments that defied any known biological or mechanical blueprint. It seemed deliberately crafted to challenge human comprehension, alien, yet eerily familiar enough to spark recognition.
Not long ago, NASA pushed the boundaries of computation by launching an experimental quantum computer, capable of processing vast, multidimensional data streams. But after this revelation, NASA abruptly shut down the system following the unexpected and unsettling incident, in 2023, though some believe the research continued in secret.
Meanwhile, Voyager 1—the most distant human-made object in space, still traveling beyond our solar system after 45 years—has been transmitting strange, inexplicable data. According to NASA engineers, the spacecraft’s Attitude Articulation and Control System (AACS) began sending signals that “do not reflect what’s actually happening onboard.”
Instead of useful telemetry, Voyager 1 has been broadcasting a puzzling sequence: a repeating pattern of ones and zeros. Initially dismissed as a glitch, engineers traced the anomaly to the Flight Data Subsystem (FDS), pinpointing a malfunctioning chip. Yet, despite their efforts, the signal persisted, a digital enigma from 24 billion kilometers away.
Is this merely a failing system showing its age? Or is something, or someone, intentionally altering the data?
What if this “error” is a message? And if so, who’s sending it?
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By NASA
Curiosity Navigation Curiosity Home Mission Overview Where is Curiosity? Mission Updates Science Overview Instruments Highlights Exploration Goals News and Features Multimedia Curiosity Raw Images Images Videos Audio Mosaics More Resources Mars Missions Mars Sample Return Mars Perseverance Rover Mars Curiosity Rover MAVEN Mars Reconnaissance Orbiter Mars Odyssey More Mars Missions Mars Home 4 min read
Sols 4529-4531: Honeycombs and Waffles… on Mars!
NASA’s Mars rover Curiosity captured this image of its current workspace, containing well-preserved polygonal shaped fractures, with waffle or honeycomb patterns. The rover acquired this image using its Front Hazard Avoidance Camera (Front Hazcam) on May 1, 2025 — Sol 4527, or Martian day 4,527 of the Mars Science Laboratory mission — at 16:41:35 UTC. NASA/JPL-Caltech Written by Catherine O’Connell-Cooper, Planetary Geologist at University of New Brunswick
Earth planning date: Friday, May 2, 2025
From our Wednesday stopping spot, the drive direction ahead (looking along the path we would follow in the Wednesday drive) appeared to be full of rough, gnarly material, which can be tricky targets for contact science instruments like APXS. However, coming into planning this morning, we found a workspace with amazingly well preserved polygonal shaped fractures, with raised ridges (about 1 centimeter, or about 0.39 inches, high), looking like a patchwork of honeycombs, or maybe a patch of waffles. We have spotted these before but usually not as well preserved and extensive as this — we can see these stretching away into the distance for 20-30 meters (about 66-98 feet), almost to the edge of the “boxwork” fracture structures at “Ghost Mountain” butte in this Navcam image. We are all counting down the drives to get to the boxwork structures — this will be such an exciting campaign to be part of.
As APXS operations planner today, I was really interested to see if we could get APXS close to one of the raised ridges, to determine what they are made of. The Rover Planners were able to get a paired set of targets — “Orosco Ridge” along a ridge and “Box Canyon” in the adjacent, flat center of the polygon. The ChemCam team is also interested (in truth, everyone on the team is interested!!) in the composition of the ridges. So ChemCam will use LIBS to measure both bedrock and ridge fill at “Kitchen Creek” on the first sol of the plan and “Storm Canyon” on the second sol.
The “problem” with a workspace like this is picking which images to take in our short time here, before we drive on the second sol. We could stay here for a week and still find things to look at in this workspace. After much discussion, it was decided that MAHLI should focus on a “dog’s eye” mosaic (“Valley of the Moon”) along the vertical face of the large block. We hope this will allow us to examine how the fractures interact with each other, and with the preexisting layering in the bedrock.
Mastcam will then focus on the two main blocks in the workspace in an 8×4 (4 rows of 8 images) Kitchen Creek mosaic, which also encompasses the LIBS target of the same name, and a single image on the Storm Canyon LIBS target. Three smaller mosaics at “Green Valley Falls” (3×1), “Lost Palms Canyon” (7×2) and “San Andreas Fault” (1×2) will examine the relationships between the polygonal features and other fractures in the workspace, close to the rover.
Further afield, ChemCam will turn the “LD RMI” (Long-Distance Remote Micro Imager) on “Texoli” butte (the large butte to the side of the rover, visible in this image from sol 4528). Both Mastcam and ChemCam will image the boxwork fracture system near Ghost Mountain — they are so close now, it’s just a few drives away! Any information we get now may be able to help us answer some of the questions we have on the origin and timing of the boxwork structures, especially when we can combine it with the in situ analysis we will be getting shortly! (Did I mention how excited we all are about this campaign?)With all the excitement today on the wild fracture structures, it could be easy to overlook Curiosity’s dataset of environmental and atmospheric data. For more than 12 years now, we have been collecting information on dust and argon levels in the atmosphere, water and chlorine levels in the subsurface, wind speeds, humidity, temperature, ultraviolet radiation, pressure, and capturing movies and images of dust devils. This weekend is no different, adding a full complement of activities from almost every team — Navcam, REMS, DAN, Mastcam, ChemCam, and APXS will all collect data for the environmental and atmospheric theme group (ENV) in this plan.
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Last Updated May 06, 2025 Related Terms
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Explore This Section Webb News Latest News Latest Images Webb’s Blog Awards X (offsite – login reqd) Instagram (offsite – login reqd) Facebook (offsite- login reqd) Youtube (offsite) Overview About Who is James Webb? Fact Sheet Impacts+Benefits FAQ Science Overview and Goals Early Universe Galaxies Over Time Star Lifecycle Other Worlds Observatory Overview Launch Deployment Orbit Mirrors Sunshield Instrument: NIRCam Instrument: MIRI Instrument: NIRSpec Instrument: FGS/NIRISS Optical Telescope Element Backplane Spacecraft Bus Instrument Module Multimedia About Webb Images Images Videos What is Webb Observing? 3d Webb in 3d Solar System Podcasts Webb Image Sonifications Team International Team People Of Webb More For the Media For Scientists For Educators For Fun/Learning 6 Min Read NASA’s Webb Lifts Veil on Common but Mysterious Type of Exoplanet
This artist’s concept shows what the hot sub-Neptune exoplanet TOI-421 b could look like. It is based on spectroscopic data gathered by Webb, as well as previous observations from other telescopes on the ground and in space. Credits:
Illustration: NASA, ESA, CSA, Dani Player (STScI) Though they don’t orbit around our Sun, sub-Neptunes are the most common type of exoplanet, or planet outside our solar system, that have been observed in our galaxy. These small, gassy planets are shrouded in mystery…and often, a lot of haze. Now, by observing exoplanet TOI-421 b, NASA’s James Webb Space Telescope is helping scientists understand sub-Neptunes in a way that was not possible prior to the telescope’s launch.
“I had been waiting my entire career for Webb so that we could meaningfully characterize the atmospheres of these smaller planets,” said principal investigator Eliza Kempton of the University of Maryland, College Park. “By studying their atmospheres, we’re getting a better understanding of how sub-Neptunes formed and evolved, and part of that is understanding why they don’t exist in our solar system.”
Image A: Artist’s Concept of TOI-421 b
This artist’s concept shows what the hot sub-Neptune exoplanet TOI-421 b could look like. It is based on spectroscopic data gathered by Webb, as well as previous observations from other telescopes on the ground and in space. Illustration: NASA, ESA, CSA, Dani Player (STScI) Small, Cool, Shrouded in Haze
The existence of sub-Neptunes was unexpected before they were discovered by NASA’s retired Kepler space telescope in the last decade. Now, astronomers are trying to understand where these planets came from and why are they so common.
Before Webb, scientists had very little information on them. While sub-Neptunes are a few times larger than Earth, they are still much smaller than gas-giant planets and typically cooler than hot Jupiters, making them much more challenging to observe than their gas-giant counterparts.
A key finding prior to Webb was that most sub-Neptune atmospheres had flat or featureless transmission spectra. This means that when scientists observed the spectrum of the planet as it passed in front of its host star, instead of seeing spectral features – the chemical fingerprints that would reveal the composition of the atmosphere – they saw only a flat-line spectrum. Astronomers concluded from all of those flat-line spectra that at least certain sub-Neptunes were probably very highly obscured by either clouds or hazes.
Image B: Spectrum of TOI-421 b
A transmission spectrum captured by NASA’s James Webb Space Telescope reveals chemicals in the atmosphere of the hot sub-Neptune exoplanet TOI-421 b. Illustration: NASA, ESA, CSA, Joseph Olmsted (STScI) A Different Kind of Sub-Neptune?
“Why did we observe this planet, TOI-421 b? It’s because we thought that maybe it wouldn’t have hazes,” said Kempton. “And the reason is that there were some previous data that implied that maybe planets over a certain temperature range were less enshrouded by haze or clouds than others.”
That temperature threshold is about 1,070 degrees Fahrenheit. Below that, scientists hypothesized that a complex set of photochemical reactions would occur between sunlight and methane gas, and that would trigger the haze. But hotter planets shouldn’t have methane and therefore perhaps shouldn’t have haze.
The temperature of TOI-421 b is about 1,340 degrees Fahrenheit, well above the presumed threshold. Without haze or clouds, researchers expected to see a clear atmosphere – and they did!
A Surprising Finding
“We saw spectral features that we attribute to various gases, and that allowed us to determine the composition of the atmosphere,” said the University of Maryland’s Brian Davenport, a third-year Ph.D. student who conducted the primary data analysis. “Whereas with many of the other sub-Neptunes that had been previously observed, we know their atmospheres are made of something, but they’re being blocked by haze.”
The team found water vapor in the planet’s atmosphere, as well as tentative signatures of carbon monoxide and sulfur dioxide. Then there are molecules they didn’t detect, such as methane and carbon dioxide. From the data, they can also infer that a large amount of hydrogen is in TOI-421 b’s atmosphere.
The lightweight hydrogen atmosphere was the big surprise to the researchers. “We had recently wrapped our mind around the idea that those first few sub-Neptunes observed by Webb had heavy-molecule atmospheres, so that had become our expectation, and then we found the opposite,” said Kempton. This suggests TOI-421 b may have formed and evolved differently from the cooler sub-Neptunes observed previously.
Is TOI-421 b Unique?
The hydrogen-dominated atmosphere is also interesting because it mimics the composition of TOI-421 b’s host star. “If you just took the same gas that made the host star, plopped it on top of a planet’s atmosphere, and put it at the much cooler temperature of this planet, you would get the same combination of gases. That process is more in line with the giant planets in our solar system, and it is different from other sub-Neptunes that have been observed with Webb so far,” said Kempton.
Aside from being hotter than other sub-Neptunes previously observed with Webb, TOI-421 b orbits a Sun-like star. Most of the other sub-Neptunes that have been observed so far orbit smaller, cooler stars called red dwarfs.
Is TOI-421b emblematic of hot sub-Neptunes orbiting Sun-like stars, or is it just that exoplanets are very diverse? To find out, the researchers would like to observe more hot sub-Neptunes to determine if this is a unique case or a broader trend. They hope to gain insights into the formation and evolution of these common exoplanets.
“We’ve unlocked a new way to look at these sub-Neptunes,” said Davenport. “These high-temperature planets are amenable to characterization. So by looking at sub-Neptunes of this temperature, we’re perhaps more likely to accelerate our ability to learn about these planets.”
The team’s findings appear on May 5 in the Astrophysical Journal Letters.
The James Webb Space Telescope is the world’s premier space science observatory. Webb is solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the mysterious structures and origins of our universe and our place in it. Webb is an international program led by NASA with its partners, ESA (European Space Agency) and CSA (Canadian Space Agency).
To learn more about Webb, visit:
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Space Telescope Science Institute, Baltimore, Md.
Hannah Braun – hbraun@stsci.edu
Space Telescope Science Institute, Baltimore, Md.
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