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By NASA
3 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
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A 3D simulation showing the evolution of turbulent flows in the upper layers of the Sun. The more saturated and bright reds represent the most vigorous upward or downward twisting motions. Clear areas represent areas where there is only relatively slow up-flows, with very little twisting.NASA/Irina Kitiashvili and Timothy A. Sandstrom NASA supercomputers are shedding light on what causes some of the Sun’s most complex behaviors. Using data from the suite of active Sun-watching spacecraft currently observing the star at the heart of our solar system, researchers can explore solar dynamics like never before.
The animation shows the strength of the turbulent motions of the Sun’s inner layers as materials twist into its atmosphere, resembling a roiling pot of boiling water or a flurry of schooling fish sending material bubbling up to the surface or diving it further down below.
“Our simulations use what we call a realistic approach, which means we include as much as we know to-date about solar plasma to reproduce different phenomena observed with NASA space missions,” said Irina Kitiashvili, a scientist at NASA’s Ames Research Center in California’s Silicon Valley who helped lead the study.
Using modern computational capabilities, the team was able, for the first time to reproduce the fine structures of the subsurface layer observed with NASA’s Solar Dynamics Observatory.
“Right now, we don’t have the computational capabilities to create realistic global models of the entire Sun due to the complexity,” said Kitiashvili. “Therefore, we create models of smaller areas or layers, which can show us structures of the solar surface and atmosphere – like shock waves or tornado-like features measuring only a few miles in size; that’s much finer detail than any one spacecraft can resolve.”
Scientists seek to better understand the Sun and what phenomena drive the patterns of its activity. The connection and interactions between the Sun and Earth drive the seasons, ocean currents, weather, climate, radiation belts, auroras and many other phenomena. Space weather predictions are critical for exploration of space, supporting the spacecraft and astronauts of NASA’s Artemis campaign. Surveying this space environment is a vital part of understanding and mitigating astronaut exposure to space radiation and keeping our spacecraft and instruments safe.
This has been a big year for our special star, studded with events like the annular eclipse, a total eclipse, and the Sun reaching its solar maximum period. In December 2024, NASA’s Parker Solar Probe mission – which is helping researchers to understand space weather right at the source – will make its closest-ever approach to the Sun and beat its own record of being the closest human-made object to reach the Sun.
The Sun keeps surprising us. We are looking forward to seeing what kind of exciting events will be organized by the Sun."
Irina Kitiashvili
NASA Scientist
“The Sun keeps surprising us,” said Kitiashvili. “We are looking forward to seeing what kind of exciting events will be organized by the Sun.”
These simulations were run on the Pleaides supercomputer at the NASA Advanced Supercomputing facility at NASA Ames over several weeks of runtime, generating terabytes of data.
NASA is showcasing 29 of the agency’s computational achievements at SC24, the international supercomputing conference, Nov. 17-22, 2023, in Atlanta, Georgia. For more technical information, visit:
https://www.nas.nasa.gov/sc24
For news media: Members of the news media interested in covering this topic should reach out to the NASA Ames newsroom.
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Last Updated Nov 21, 2024 Related Terms
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Parker Solar Probe
On a mission to “touch the Sun,” NASA’s Parker Solar Probe became the first spacecraft to fly through the corona…
Solar Storms and Flares
Solar storms and flares are eruptions from the Sun that can affect us here on Earth.
Solar System
Track the Solar Cycle with Sunspots
Participate in sunspot-counting activities using NASA telescopes or your own.
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By NASA
Unable to render the provided source NASA invites the public to virtually sail along with the Advanced Composite Solar Sail System‘s space journey using NASA’s “Eyes on the Solar System” visualization tool, a digital model of the solar system. This simulation shows the real-time positions of the planets, moons, and spacecraft – including NASA’s Advanced Composite Solar Sail System.
Solar sails use the pressure of sunlight for propulsion, angling toward or away from the Sun so that photons bounce off the reflective sail to push a spacecraft. This eliminates the need for heavy propulsion systems and could enable longer duration and lower cost missions. The results from this technology demonstration – including the test of the sail’s composite boom system – will advance future space exploration to expand our understanding of our Sun and solar system.
The Advanced Composite Solar Sail System, which launched in April 2024, and deployed its reflective sail in August, is currently orbiting approximately 600 miles (1,000 kilometers) above Earth and is frequently visible in the night sky to observers in the Northern Hemisphere. Fans of the spacecraft can look for the sail in the night sky using a new feature in the NASA mobile app. Visibility may be intermittent, and the spacecraft could appear at variable levels of brightness as it moves in orbit.
For more mission updates, follow NASA’s Small Satellite Missions blog.
NASA’s Ames Research Center in California’s Silicon Valley, manages the Advanced Composite Solar Sail System project and designed and built the onboard camera diagnostic system. NASA Langley designed and built the deployable composite booms and solar sail system. NASA’s Small Spacecraft Technology (SST) program office based at NASA Ames and led by the agency’s Space Technology Mission Directorate (STMD), funds and manages the mission. NASA STMD’s Game Changing Development program funded the development of the deployable composite boom technology.
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By Space Force
The third annual 2024 Department of the Air Force Modeling and Simulation Summit was held at the Grand Hyatt River Walk in San Antonio, Texas, May 7-9.
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By NASA
5 min read
NASA’s Webb Telescope Improves Simulation Software
The James Webb Space Telescope captures a tightly bound pair of actively forming stars, known as Herbig-Haro 46/47, in high-resolution near-infrared light. The James Webb Space Telescope truly explores the unknown, displaying stunning images of previously unseen corners of the universe only possible because of the telescope’s 21-foot segmented mirror that unfurled and assembled itself in space.
Decades of testing went into the materials, design, and processes needed to develop the largest telescope in space. However, the whole project was too complex to test on the ground, at scale, at minus 400 degrees Fahrenheit, and in other space-like conditions.
Instead, engineers relied on software simulations to understand how the telescope would behave under different in-space conditions, and that work has helped advance the whole field of integrated computer modeling.
The Ansys Zemax OpticStudio software package, pictured here in a demo of James Webb Space Telescope mirror modeling, was equipped with new capabilities and features as a result of being used in the observatory’s development. Ansys Inc. “We pushed everything, all the simulation, just as hard as it would go,” said Erin Elliott, an optical engineer at Ansys, Inc., which makes Ansys Zemax OpticStudio, one of the design software suites used to develop hardware and software for the Webb telescope.
Simulation technology has improved dramatically over the last two decades because of increases in computing power and new ways of accessing offsite computing power as a cloud service. But additional improvements trace back directly to Webb’s development.
Elliott used OpticStudio to support the Webb telescope while working for other NASA contractors, beginning in the early 2000s, before starting work in 2015 for Zemax ¬– which later became Ansys Zemax ¬– headquartered in Canonsburg, Pennsylvania.
In the early days, Elliott said, Zemax tweaked its software for the Webb telescope effort. “They made some specific changes for us at the time having to do with handling the coordinate systems of the segments,” she said, referring to the 18 hexagonal segments that make up the telescope’s primary mirror.
Elliott also recalled talking to Zemax leadership numerous times about the need for the software to communicate better with other Microsoft Windows programs. The company introduced an API, or application programming interface, for OpticStudio, which enables the suite to work with other programs and allows for further customization. There were plenty of reasons to add that technology but Webb demands were likely significant among them, Elliott said.
An engineer examines the Webb telescope primary mirror Engineering Design Unit segment in the clean room at NASA’s Goddard Space Flight Center. NASA Joseph Howard, an optical engineer at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, where Webb and its science instrument module were assembled, noted that using several modeling packages helped drive innovation in the field. “It’s important to have multiple software companies out there that can help you not only for cross-checking the modeling, but because they make each other better through competition,” he said.
In addition to improvements made to OpticStudio during Webb telescope development, Ansys Zemax in 2021 introduced the Structural, Thermal, Analysis, and Results (STAR) module, which benefited from the knowledge Elliott gained working on the NASA project.
The first six flight-ready James Webb Space Telescope primary mirror segments are prepped to begin final cryogenic testing at NASA’s Marshall Space Flight Center.NASA When a mirror or lens changes shape due to temperature swings, the optics move. Much of the OpticStudio modeling was completed in smaller pieces — engineers would run a thermal simulation independently and add that data to the next optical model, generating more data for the next run.
The STAR module incorporates analyses from other simulation software directly into OpticStudio optical models — an efficiency applicable to telescope and aerospace designs. This feature is also increasingly important for autonomous vehicles, cell phone lenses, and other optics working in tough environments.
Future telescopes and other spacecraft are likely to involve elements of the Webb design. More will travel in segments that must self-assemble in space, and the development of the increasingly complicated robotics and optics will rely on improved modeling software.
“When we built Webb, we knew we couldn’t fully test it on the ground prior to flight, so we depended a whole lot upon modeling and doing analysis to get ready for flight,” Howard said. “The next great observatory will be even more dependent on modeling software.”
Meanwhile, designers of more earthly technologies are already seeing the benefits of an improved OpticStudio, using it to design precision endoscopes, a thermal imager to detect COVID-19 exposures in a crowd, augmented reality displays and headsets, a laser thruster technology for nanosatellites, and, of course, more telescopes.
Elliott also noted that the Webb telescope project trained the next cohort of telescope and optical device builders – those designing and using the telescope’s technological spinoffs.
“The people who built the Hubble Space Telescope were leading the Webb Telescope,” she said. “And now the younger engineers who cut our teeth on this project and learned from it are becoming the group of people who will build the next structures.”
Elliott maintains that the project “was worth it alone for training this huge cohort of young engineers and releasing them into high-tech fields.”
NASA has a long history of transferring technology to the private sector. The agency’s Spinoff publication profiles NASA technologies that have transformed into commercial products and services, demonstrating the broader benefits of America’s investment in its space program. Spinoff is a publication of the Technology Transfer program in NASA’s Space Technology Mission Directorate (STMD).
For more information on how NASA brings space technology down to Earth, visit:
www.spinoff.nasa.gov
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Last Updated Oct 31, 2023 Editor Loura Hall Contact Ann M. Harkeyann.m.harkey@nasa.gov Related Terms
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By NASA
The first crew to take part in a yearlong NASA Mars analog mission reached a milestone of 100 days inside the 1,700-square-foot habitat on October 3.
The four person, volunteer crew entered the CHAPEA (Crew Health and Performance Exploration Analog) habitat at NASA’s Johnson Space center in Houston on June 25 to begin a 378-day Mars surface simulation.
Throughout their mission, the crew is carrying out different types of mission activities future astronauts will take part in during a human Mars mission, including simulated spacewalks, robotic operations, habitat maintenance, personal hygiene, exercise, and crop growth.
While the CHAPEA crew is also simulating Mars-realistic communication delay of up to 22-minutes one-way, they have periodically captured and shared images of their experience.
Nathan Jones, CHAPEA mission 1 medical officer, gives Anca Selariu, CHAPEA mission 1 science officer, the first haircut inside the simulated Mars habitat.NASA/CHAPEA crew Nathan Jones participates in a simulated “Marswalk” inside the 1,200 square foot sandbox, which is connected to the habitat through an airlock.NASA/CHAPEA crew CHAPEA crew members Ross Brockwell and Anca Selariu complete geology work using the glovebox inside the habitat.NASA/CHAPEA crew NASA is leading a return to the Moon for long-term science and exploration. Through Artemis missions, NASA will land the first woman and first person of color on the Moon, using innovative technologies to explore more of the lunar surface than ever before. Lessons learned on and around the Moon and activities like CHAPEA on the ground will prepare NASA for the next giant leap: sending astronauts to Mars.
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