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By NASA
Technicians with ESA (European Space Agency) and Airbus installed the four solar array wings on NASA’s Orion spacecraft for Artemis II on March 3. The solar array wings, attached to the service module, deploy after Orion reaches space to power the spacecraft.
Orion’s service module provides propulsion, thermal control, and electrical power, as well as air and water for the crew during their mission around the Moon.
Each solar array wing has 15,000 solar cells to convert sunlight to electricity and is nearly 23 feet in length when fully deployed. In space, the arrays can turn on two axes to remain aligned with the Sun.
Artemis II is the first crewed mission under NASA’s Artemis campaign. Through Artemis, the agency will send astronauts to explore the Moon for scientific discovery, economic benefits, and build the foundation for the first crewed missions to Mars.
Image credit: NASA/Kim Shiflett
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By NASA
Tess Caswell, a stand-in crew member for the Artemis III Virtual Reality Mini-Simulation, executes a moonwalk in the Prototype Immersive Technology (PIT) lab at NASA’s Johnson Space Center in Houston. The simulation was a test of using VR as a training method for flight controllers and science teams’ collaboration on science-focused traverses on the lunar surface. Credit: NASA/Robert Markowitz When astronauts walk on the Moon, they’ll serve as the eyes, hands, and boots-on-the-ground interpreters supporting the broader teams of scientists on Earth. NASA is leveraging virtual reality to provide high-fidelity, cost-effective support to prepare crew members, flight control teams, and science teams for a return to the Moon through its Artemis campaign.
The Artemis III Geology Team, led by principal investigator Dr. Brett Denevi of the Johns Hopkins University Applied Physics Laboratory in Laurel, Maryland, participated in an Artemis III Surface Extra-Vehicular VR Mini-Simulation, or “sim” at NASA’s Johnson Space Center in Houston in the fall of 2024. The sim brought together science teams and flight directors and controllers from Mission Control to carry out science-focused moonwalks and test the way the teams communicate with each other and the astronauts.
“There are two worlds colliding,” said Dr. Matthew Miller, co-lead for the simulation and exploration engineer, Amentum/JETSII contract with NASA. “There is the operational world and the scientific world, and they are becoming one.”
NASA mission training can include field tests covering areas from navigation and communication to astronaut physical and psychological workloads. Many of these tests take place in remote locations and can require up to a year to plan and large teams to execute. VR may provide an additional option for training that can be planned and executed more quickly to keep up with the demands of preparing to land on the Moon in an environment where time, budgets, and travel resources are limited.
VR helps us break down some of those limitations and allows us to do more immersive, high-fidelity training without having to go into the field. It provides us with a lot of different, and significantly more, training opportunities.
BRI SPARKS
NASA co-lead for the simulation and Extra Vehicular Activity Extended Reality team at Johnson.
Field testing won’t be going away. Nothing can fully replace the experience crew members gain by being in an environment that puts literal rocks in their hands and incudes the physical challenges that come with moonwalks, but VR has competitive advantages.
The virtual environment used in the Artemis III VR Mini-Sim was built using actual lunar surface data from one of the Artemis III candidate regions. This allowed the science team to focus on Artemis III science objectives and traverse planning directly applicable to the Moon. Eddie Paddock, engineering VR technical discipline lead at NASA Johnson, and his team used data from NASA’s Lunar Reconnaissance Orbiter and planet position and velocity over time to develop a virtual software representation of a site within the Nobile Rim 1 region near the south pole of the Moon. Two stand-in crew members performed moonwalk traverses in virtual reality in the Prototype Immersive Technology lab at Johnson, and streamed suit-mounted virtual video camera views, hand-held virtual camera imagery, and audio to another location where flight controllers and science support teams simulated ground communications.
A screen capture of a virtual reality view during the Artemis III VR Mini-Simulation. The lunar surface virtual environment was built using actual lunar surface data from one of the Artemis III candidate regions. Credit: Prototype Immersive Technology lab at NASA’s Johnson Space Center in Houston. The crew stand-ins were immersed in the lunar environment and could then share the experience with the science and flight control teams. That quick and direct feedback could prove critical to the science and flight control teams as they work to build cohesive teams despite very different approaches to their work.
The flight operations team and the science team are learning how to work together and speak a shared language. Both teams are pivotal parts of the overall mission operations. The flight control team focuses on maintaining crew and vehicle safety and minimizing risk as much as possible. The science team, as Miller explains, is “relentlessly thirsty” for as much science as possible. Training sessions like this simulation allow the teams to hone their relationships and processes.
Members of the Artemis III Geology Team and science support team work in a mock Science Evaluation Room during the Artemis III Virtual Reality Mini-Simulation at NASA’s Johnson Space Center in Houston. Video feeds from the stand-in crew members’ VR headsets allow the science team to follow, assess, and direct moonwalks and science activities. Credit: NASA/Robert Markowitz Denevi described the flight control team as a “well-oiled machine” and praised their dedication to getting it right for the science team. Many members of the flight control team have participated in field and classroom training to learn more about geology and better understand the science objectives for Artemis.
“They have invested a lot of their own effort into understanding the science background and science objectives, and the science team really appreciates that and wants to make sure they are also learning to operate in the best way we can to support the flight control team, because there’s a lot for us to learn as well,” Denevi said. “It’s a joy to get to share the science with them and have them be excited to help us implement it all.”
Artemis III Geology Team lead Dr. Brett Denevi of the Johns Hopkins University Applied Physics Laboratory in Laurel, Maryland, left, Artemis III Geology Team member, Dr. Jose Hurtado, University of Texas at El Paso, and simulation co-lead, Bri Sparks, work together during the Artemis III Virtual Reality Mini-Simulation at NASA’s Johnson Space Center in Houston. Credit: NASA/Robert Markowitz This simulation, Sparks said, was just the beginning for how virtual reality could supplement training opportunities for Artemis science. In the future, using mixed reality could help take the experience to the next level, allowing crew members to be fully immersed in the virtual environment while interacting with real objects they can hold in their hands. Now that the Nobile Rim 1 landing site is built in VR, it can continue to be improved and used for crew training, something that Sparks said can’t be done with field training on Earth.
While “virtual” was part of the title for this exercise, its applications are very real.
“We are uncovering a lot of things that people probably had in the back of their head as something we’d need to deal with in the future,” Miller said. “But guess what? The future is now. This is now.”
Test subject crew members for the Artemis III Virtual Reality Mini-Simulation, including Grier Wilt, left, and Tess Caswell, center, execute a moonwalk in the Prototype Immersive Technology lab at NASA’s Johnson Space Center in Houston. Credit: NASA/Robert Markowitz Grier Wilt, left, and Tess Caswell, crew stand-ins for the Artemis III Virtual Reality Mini-Simulation, execute a moonwalk in the Prototype Immersive Technology (PIT) lab at NASA’s Johnson Space Center in Houston. Credit: NASA/Robert Markowitz Engineering VR technical discipline lead Eddie Paddock works with team members to facilitate the virtual reality components of the Artemis III Virtual Reality Mini-Simulation in the Prototype Immersive Technology lab at NASA’s Johnson Space Center in Houston. Credit: Robert Markowitz Flight director Paul Konyha follows moonwalk activities during the Artemis III Virtual Reality Mini-Simulation at NASA’s Johnson Space Center in Houston. Credit: NASA/Robert Markowitz
Rachel Barry
NASA’s Johnson Space Center
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Preparations for Next Moonwalk Simulations Underway (and Underwater)
An artist’s concept depicts one of NASA’s Voyager probes. The twin spacecraft launched in 1977.NASA/JPL-Caltech The farthest-flung human-made objects will be able to take their science-gathering even farther, thanks to these energy-conserving measures.
Mission engineers at NASA’s Jet Propulsion Laboratory in Southern California turned off the cosmic ray subsystem experiment aboard Voyager 1 on Feb. 25 and will shut off Voyager 2’s low-energy charged particle instrument on March 24. Three science instruments will continue to operate on each spacecraft. The moves are part of an ongoing effort to manage the gradually diminishing power supply of the twin probes.
Launched in 1977, Voyagers 1 and 2 rely on a radioisotope power system that generates electricity from the heat of decaying plutonium. Both lose about 4 watts of power each year.
“The Voyagers have been deep space rock stars since launch, and we want to keep it that way as long as possible,” said Suzanne Dodd, Voyager project manager at JPL. “But electrical power is running low. If we don’t turn off an instrument on each Voyager now, they would probably have only a few more months of power before we would need to declare end of mission.”
The two spacecraft carry identical sets of 10 science instruments. Some of the instruments, geared toward collecting data during planetary flybys, were turned off after both spacecraft completed their exploration of the solar system’s gas giants.
The instruments that remained powered on well beyond the last planetary flyby were those the science team considered important for studying the solar system’s heliosphere, a protective bubble of solar wind and magnetic fields created by the Sun, and interstellar space, the region outside the heliosphere. Voyager 1 reached the edge of the heliosphere and the beginning of interstellar space in 2012; Voyager 2 reached the boundary in 2018. No other human-made spacecraft has operated in interstellar space.
Last October, to conserve energy, the project turned off Voyager 2’s plasma science instrument, which measures the amount of plasma — electrically charged atoms — and the direction it is flowing. The instrument had collected only limited data in recent years due to its orientation relative to the direction that plasma flows in interstellar space. Voyager 1’s plasma science instrument had been turned off years ago because of degraded performance.
Interstellar Science Legacy
The cosmic ray subsystem that was shut down on Voyager 1 last week is a suite of three telescopes designed to study cosmic rays, including protons from the galaxy and the Sun, by measuring their energy and flux. Data from those telescopes helped the Voyager science team determine when and where Voyager 1 exited the heliosphere.
Scheduled for deactivation later this month, Voyager 2’s low-energy charged particle instrument measures the various ions, electrons, and cosmic rays originating from our solar system and galaxy. The instrument consists of two subsystems: the low-energy particle telescope for broader energy measurements, and the low-energy magnetospheric particle analyzer for more focused magnetospheric studies.
Both systems use a rotating platform so that the field of view is 360 degrees, and the platform is powered by a stepper motor that provides a 15.7-watt pulse every 192 seconds. The motor was tested to 500,000 steps — enough to guarantee continuous operation through the mission’s encounters with Saturn, which occurred in August 1980 for Voyager 2. By the time it is deactivated on Voyager 2, the motor will have completed more than 8.5 million steps.
“The Voyager spacecraft have far surpassed their original mission to study the outer planets,” said Patrick Koehn, Voyager program scientist at NASA Headquarters in Washington. “Every bit of additional data we have gathered since then is not only valuable bonus science for heliophysics, but also a testament to the exemplary engineering that has gone into the Voyagers — starting nearly 50 years ago and continuing to this day.”
Addition Through Subtraction
Mission engineers have taken steps to avoid turning off science instruments for as long as possible because the science data collected by the twin Voyager probes is unique. With these two instruments turned off, the Voyagers should have enough power to operate for about a year before the team needs to shut off another instrument on both spacecraft.
In the meantime, Voyager 1 will continue to operate its magnetometer and plasma wave subsystem. The spacecraft’s low-energy charged particle instrument will operate through the remainder of 2025 but will be shut off next year.
Voyager 2 will continue to operate its magnetic field and plasma wave instruments for the foreseeable future. Its cosmic ray subsystem is scheduled to be shut off in 2026.
With the implementation of this power conservation plan, engineers believe the two probes could have enough electricity to continue operating with at least one science instrument into the 2030s. But they are also mindful that the Voyagers have been weathering deep space for 47 years and that unforeseen challenges could shorten that timeline.
Long Distance
Voyager 1 and Voyager 2 remain the most distant human-made objects ever built. Voyager 1 is more than 15 billion miles (25 billion kilometers) away. Voyager 2 is over 13 billion miles (21 billion kilometers) from Earth.
In fact, due to this distance, it takes over 23 hours to get a radio signal from Earth to Voyager 1, and 19½ hours to Voyager 2.
“Every minute of every day, the Voyagers explore a region where no spacecraft has gone before,” said Linda Spilker, Voyager project scientist at JPL. “That also means every day could be our last. But that day could also bring another interstellar revelation. So, we’re pulling out all the stops, doing what we can to make sure Voyagers 1 and 2 continue their trailblazing for the maximum time possible.”
For more information about NASA’s Voyager missions, visit:
https://science.nasa.gov/mission/voyager
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DC Agle / Calla Cofield
Jet Propulsion Laboratory, Pasadena, Calif.
818-653-6297 / 626-808-2469
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Last Updated Mar 05, 2025 Related Terms
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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 2 min read
Sols 4468-4470: A Wintry Mix of Mars Science
NASA’s Mars rover Curiosity captured this image showing its wheel awkwardly perched atop one of the rocks in this location, as well as the textures of the layered sulfate unit bedrock blocks. The rover used its Left Navigation Camera (Navcam), one of a pair of stereo cameras on either side of the rover’s masthead, to record the image on Feb. 28, 2025, on sol 4466, or Martian day 4,466 of the Mars Science Laboratory mission, at 00:34:10 UTC. NASA/JPL-Caltech Written by Lucy Lim, Planetary Scientist at NASA’s Goddard Space Flight Center
Earth planning date: Friday, Feb. 28, 2025
Curiosity continues to climb roughly southward through the layered sulfate strata toward the “boxwork” features. Although the previous plan’s drive successfully advanced the rover roughly 21 meters southward (about 69 feet), the drive had ended with an awkwardly perched wheel. Because of this, unfortunately it was considered too risky to unstow the arm for contact science in this plan.
Nevertheless the team made the most of the imaging and LIBS observations available from the rover’s current location. A large Mastcam mosaic was planned on the nearby Texoli butte to capture its sedimentary structures from the rover’s new perspective. Toward the west, the boxwork strata exposed on “Gould Mesa” were observed using the ChemCam long-distance imaging capability, with Mastcam providing color context.
Several near-field Mastcam mosaics also captured some bedding and diagenetic structure in the nearby blocks as well as some modern aeolian troughs in the finer-grained material around them.
On the nearby blocks, two representative local blocks (“Gabrelino Trail” and “Sespe Creek”) are to be “zapped” with the ChemCam laser to give us LIBS (laser-induced breakdown spectroscopy) compositional measurements. The original Gabrelino Trail on Earth near the JPL campus is currently closed due to damage from the recent wildfires.
Meanwhile, the season on Mars (L_s ~ 50, or a solar longitude of about 50 degrees, heading into southern winter) has brought with it the opportunity to observe some recurring atmospheric phenomena: It’s aphelion cloud belt season, as well as Hadley cell transition season, during which a more southerly air mass crosses over Gale Crater.
This plan includes an APXS atmospheric observation (no arm movement required!) to measure argon and a ChemCam passive-sky observation to measure O2, which is a small (less than 1%) but measurable component in the Martian atmosphere. Dedicated cloud altitude observations, a phase function sky survey, and zenith and suprahorizon movies have also been included in the plan to characterize the clouds. As usual, the rover also continues to monitor the modern environment with measurements of atmospheric opacity via imaging, temperature, and humidity with REMS, and the local neutron environment with DAN.
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Preparations for Next Moonwalk Simulations Underway (and Underwater)
A team from University High School of Irvine, California, won the 2025 regional Science Bowl at NASA’s Jet Propulsion Laboratory on March 1. From left, co-coach Nick Brighton, sophomores Shloke Kamat and Timothy Chen, juniors Feodor Yevtushenko and Angelina Yan, senior Sara Yu, and coach David Knight.NASA/JPL-Caltech In a fast-paced competition, students showcased their knowledge across a wide range of science and math topics.
What is the molecular geometry of sulfur tetrafluoride? Which layer of the Sun is thickest? What is the average of the first 10 prime numbers? If you answered “see-saw,” “radiation zone,” and “12.9,” respectively, then you know a tiny fraction of what high school students must learn to compete successfully in the National Science Bowl.
On Saturday, March 1, students from University High School in Irvine answered enough of these kind of challenging questions correctly to earn the points to defeat 19 other high school teams, winning a regional Science Bowl competition hosted by NASA’s Jet Propulsion Laboratory in Southern California. Troy High, from Fullerton, won second place, while Arcadia High placed third.
Some 100 students gathered at JPL for the fast-paced event, which drew schools from across Los Angeles, Orange, and San Bernardino counties. Teams are composed of four students and one alternate, with a teacher serving as coach. Two teams at a time face off in a round robin tournament, followed by tie-breaker and double-elimination rounds, then final matches.
Students, coaches, and volunteers gathered on March 1 for the annual regional Science Bowl competition held at JPL, which has hosted the event since 1993.NASA/JPL-Caltech The questions — in biology, chemistry, Earth and space science, energy, mathematics, and physics — are at a college first-year level. Students spend months preparing, studying, quizzing each other, and practicing with “Jeopardy!”-style buzzers.
It was the third year in a row for a University victory at the JPL-hosted event, and the championship round with Troy was a nail-biter until the very last question. The University team only had one returning student from the previous year’s team, junior Feodor Yevtushenko. Both he and longtime team coach and science teacher David Knight said the key to success is specialization — with each student focusing on particular topic areas.
“I wake up and grind math before school,” Feodor said. “Being a jack-of-all-trades means you’re a jack-of-no-trades. You need ruthless precision and ruthless speed.”
University also won for four years in row from 2018 to 2021. The school’s victory this year enables its team to travel to Washington in late April and vie for ultimate dominance alongside other regional event winners in the national finals.
More than 10,000 students compete in some 115 regional events held across the country. Managed by the U.S. Department of Energy, the National Science Bowl was created in 1991 to make math and science fun for students, and to encourage them to pursue careers in those fields. It’s one of the largest academic competitions in the United States.
JPL’s Public Services Office coordinates the regional contest with the help of volunteers from laboratory staff and former Science Bowl participants in the local community. This year marked JPL’s 33rd hosting the event.
News Media Contact
Melissa Pamer
Jet Propulsion Laboratory, Pasadena, Calif.
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