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By European Space Agency
The European Space Agency-led Solar Orbiter mission has split the flood of energetic particles flung out into space from the Sun into two groups, tracing each back to a different kind of outburst from our star.
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By NASA
5 min read
Astronomers Map Stellar ‘Polka Dots’ Using NASA’s TESS, Kepler
Scientists have devised a new method for mapping the spottiness of distant stars by using observations from NASA missions of orbiting planets crossing their stars’ faces. The model builds on a technique researchers have used for decades to study star spots.
By improving astronomers’ understanding of spotty stars, the new model — called StarryStarryProcess — can help discover more about planetary atmospheres and potential habitability using data from telescopes like NASA’s upcoming Pandora mission.
“Many of the models researchers use to analyze data from exoplanets, or worlds beyond our solar system, assume that stars are uniformly bright disks,” said Sabina Sagynbayeva, a graduate student at Stony Brook University in New York. “But we know just by looking at our own Sun that stars are more complicated than that. Modeling complexity can be difficult, but our approach gives astronomers an idea of how many spots a star might have, where they are located, and how bright or dark they are.”
A paper describing StarryStarryProcess, led by Sagynbayeva, published Monday, August 25, in The Astrophysical Journal.
Watch to learn how a new tool uses data from exoplanets, worlds beyond our solar system, to tell us about their polka-dotted stars.
NASA’s Goddard Space Flight Center
Download images and videos through NASA’s Scientific Visualization Studio.
NASA’s TESS (Transiting Exoplanet Survey Satellite) and now-retired Kepler Space Telescope were designed to identify planets using transits, dips in stellar brightness caused when a planet passes in front of its star.
These measurements reveal how the star’s light varies with time during each transit, and astronomers can arrange them in a plot astronomers call a light curve. Typically, a transit light curve traces a smooth sweep down as the planet starts passing in front of the star’s face. It reaches a minimum brightness when the world is fully in front of the star and then rises smoothly as the planet exits and the transit ends.
By measuring the time between transits, scientists can determine how far the planet lies from its star and estimate its surface temperature. The amount of missing light from the star during a transit can reveal the planet’s size, which can hint at its composition.
Every now and then, though, a planet’s light curve appears more complicated, with smaller dips and peaks added to the main arc. Scientists think these represent dark surface features akin to sunspots seen on our own Sun — star spots.
The Sun’s total number of sunspots varies as it goes through its 11-year solar cycle. Scientists use them to determine and predict the progress of that cycle as well as outbreaks of solar activity that could affect us here on Earth.
Similarly, star spots are cool, dark, temporary patches on a stellar surface whose sizes and numbers change over time. Their variability impacts what astronomers can learn about transiting planets.
Scientists have previously analyzed transit light curves from exoplanets and their host stars to look at the smaller dips and peaks. This helps determine the host star’s properties, such as its overall level of spottiness, inclination angle of the planet’s orbit, the tilt of the star’s spin compared to our line of sight, and other factors. Sagynbayeva’s model uses light curves that include not only transit information, but also the rotation of the star itself to provide even more detailed information about these stellar properties.
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This artist’s concept illustrates the varying brightness of star with a transiting planet and several star spots. NASA’s Goddard Space Flight Center “Knowing more about the star in turn helps us learn even more about the planet, like a feedback loop,” said co-author Brett Morris, a senior software engineer at the Space Telescope Science Institute in Baltimore. “For example, at cool enough temperatures, stars can have water vapor in their atmospheres. If we want to look for water in the atmospheres of planets around those stars — a key indicator of habitability — we better be very sure that we’re not confusing the two.”
To test their model, Sagynbayeva and her team looked at transits from a planet called TOI 3884 b, located around 141 light-years away in the northern constellation Virgo.
Discovered by TESS in 2022, astronomers think the planet is a gas giant about five times bigger than Earth and 32 times its mass.
The StarryStarryProcess analysis suggests that the planet’s cool, dim star — called TOI 3384 — has concentrations of spots at its north pole, which also tips toward Earth so that the planet passes over the pole from our perspective.
Currently, the only available data sets that can be fit by Sagynbayeva’s model are in visible light, which excludes infrared observations taken by NASA’s James Webb Space Telescope. But NASA’s upcoming Pandora mission will benefit from tools like this one. Pandora, a small satellite developed through NASA’s Astrophysics Pioneers Program, will study the atmospheres of exoplanets and the activity of their host stars with long-duration multiwavelength observations. The Pandora mission’s goal is to determine how the properties of a star’s light differs when it passes through a planet’s atmosphere so scientists can better measure those atmospheres using Webb and other missions.
“The TESS satellite has discovered thousands of planets since it launched in 2018,” said Allison Youngblood, TESS project scientist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. “While Pandora will study about 20 worlds, it will advance our ability to pick out which signals come from stars and which come from planets. The more we understand the individual parts of a planetary system, the better we understand the whole — and our own.”
Facebook logo @NASAUniverse @NASAUniverse Instagram logo @NASAUniverse By Jeanette Kazmierczak
NASA’s Goddard Space Flight Center, Greenbelt, Md.
Media Contact:
Alise Fisher
202-358-2546
alise.m.fisher@nasa.gov
NASA Headquarters, Washington
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Last Updated Aug 25, 2025 Related Terms
Astrophysics Exoplanet Atmosphere Exoplanets Galaxies, Stars, & Black Holes Galaxies, Stars, & Black Holes Research Goddard Space Flight Center Kepler / K2 Stars TESS (Transiting Exoplanet Survey Satellite) The Universe View the full article
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By European Space Agency
More than one star contributes to the irregular shape of NGC 6072 – Webb’s newest look at this planetary nebula in the near- and mid-infrared shows what may appear as a very messy scene resembling splattered paint. However, the unusual, asymmetrical scene hints at more complicated mechanisms underway, as the star central to the scene approaches the very final stages of its life and expels shells of material, losing up to 80 percent of its mass.
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By NASA
Explore Webb 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 Webb’s First Images Team International Team People Of Webb More For the Media For Scientists For Educators For Fun/Learning 5 Min Read NASA’s Webb Traces Details of Complex Planetary Nebula
NASA’s James Webb Space Telescope’s view of planetary nebula NGC 6072 in the near-infrared shows a complex scene of multiple outflows expanding out at different angles from a dying star at the center of the scene. In this image, the red areas represent cool molecular gas, for example, molecular hydrogen. Full image below. Credits:
NASA, ESA, CSA, STScI Since their discovery in the late 1700s, astronomers have learned that planetary nebulae, or the expanding shell of glowing gas expelled by a low-intermediate mass star late in its life, can come in all shapes and sizes. Most planetary nebula present as circular, elliptical, or bi-polar, but some stray from the norm, as seen in new high-resolution images of planetary nebulae by NASA’s James Webb Space Telescope.
Webb’s newest look at planetary nebula NGC 6072 in the near- and mid-infrared shows what may appear as a very messy scene resembling splattered paint. However, the unusual, asymmetrical appearance hints at more complicated mechanisms underway, as the star central to the scene approaches the very final stages of its life and expels shells of material, losing up to 80 percent of its mass. Astronomers are using Webb to study planetary nebulae to learn more about the full life cycle of stars and how they impact their surrounding environments.
Image A: NGC 6072 (NIRCam Image)
NASA’s James Webb Space Telescope’s view of planetary nebula NGC 6072 in the near-infrared shows a complex scene of multiple outflows expanding out at different angles from a dying star at the center of the scene. In this image, the red areas represent cool molecular gas, for example, molecular hydrogen. NASA, ESA, CSA, STScI First, taking a look at the image from Webb’s NIRCam (Near-Infrared Camera), it’s readily apparent that this nebula is multi-polar. This means there are several different elliptical outflows jetting out either way from the center, one from 11 o’clock to 5 o’clock, another from 1 o’clock to 7 o’clock, and possibly a third from 12 o’clock to 6 o’clock. The outflows may compress material as they go, resulting in a disk seen perpendicular to it.
Astronomers say this is evidence that there are likely at least two stars at the center of this scene. Specifically, a companion star is interacting with an aging star that had already begun to shed some of its outer layers of gas and dust.
The central region of the planetary nebula glows from the hot stellar core, seen as a light blue hue in near-infrared light. The dark orange material, which is made up of gas and dust, follows pockets or open areas that appear dark blue. This clumpiness could be created when dense molecular clouds formed while being shielded from hot radiation from the central star. There could also be a time element at play. Over thousands of years, inner fast winds could be ploughing through the halo cast off from the main star when it first started to lose mass.
Image B: NGC 6072 (MIRI Image)
The mid-infrared view of planetary nebula NGC 6072 from NASA’s James Webb Space Telescope show expanding circular shells around the outflows from the dying central star. In this image, the blue represents cool molecular gas seen in red in the image from Webb’s NIRCam (Near-Infrared Camera) due to color mapping. NASA, ESA, CSA, STScI The longer wavelengths captured by Webb’s MIRI (Mid-Infrared Instrument) are highlighting dust, revealing the star researchers suspect could be central to this scene. It appears as a small pinkish-whitish dot in this image.
Webb’s look in the mid-infrared wavelengths also reveals concentric rings expanding from the central region, the most obvious circling just past the edges of the lobes.
This may be additional evidence of a secondary star at the center of the scene hidden from our view. The secondary star, as it circles repeatedly around the original star, could have carved out rings of material in a bullseye pattern as the main star was expelling mass during an earlier stage of its life.
The rings may also hint at some kind of pulsation that resulted in gas or dust being expelled uniformly in all directions separated by say, thousands of years.
The red areas in NIRCam and blue areas in MIRI both trace cool molecular gas (likely molecular hydrogen) while central regions trace hot ionized gas.
As the star at the center of a planetary nebula cools and fades, the nebula will gradually dissipate into the interstellar medium — contributing enriched material that helps form new stars and planetary systems, now containing those heavier elements.
Webb’s imaging of NGC 6072 opens the door to studying how the planetary nebulae with more complex shapes contribute to this process.
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:
https://science.nasa.gov/webb
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Media Contacts
Laura Betz – laura.e.betz@nasa.gov
NASA’s Goddard Space Flight Center, Greenbelt, Md.
Hannah Braun – hbraun@stsci.edu
Space Telescope Science Institute, Baltimore, Md.
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Last Updated Jul 30, 2025 Editor Marty McCoy Contact Laura Betz laura.e.betz@nasa.gov Related Terms
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By NASA
4 Min Read GVIS History
As part of NASA Glenn’s Scientific Computing and Visualization Team, the GVIS Lab has a storied visual and technological history. Credits: NASA GVIS: the ICARE Era
In 1982, a $20 million supercomputer was brought to NASA Glenn. Scientists at NASA Glenn were becoming increasingly reliant on computer simulations to test their experiments. Advancements in computer technology allowed a different type of testing environment — one that revolved around virtual models and data over physical observation. The benefits of this method included a decrease in costs, a decrease in associated risk, faster turnaround, and more data.
High Definition Video System (HDVS)A High Definition Video System (HDVS) in the early Graphics and Visualization Lab (GVIS). NASA High Definition Video System (HDVS) in the LabNASA employee in early Graphics and Visualization Lab (GVIS) setup, containing High Definition Video Systems (HDVS). NASA Early Graphics and Visualization Lab (GVIS)Early Graphics and Visualization Lab (GVIS) setup, which housed original analog processing hardware. NASA Cray 1-S/2200 SupercomputerThe original Cray 1-S/2200 Supercomputer in the Research and Analysis Center in 1982.NASA But this method of experimentation created a problem: With data-point counts somewhere in the millions, it was a challenge for scientists to even begin to look at their own collected data. In short, there was simply too much data to be analyzed. To solve this problem, NASA Glenn built the Interactive Computer Aided Research Engineering system (ICARE) in the center’s Research Analysis Center.
Taking up several rooms, consisting of 22 total workstations, and costing a grand total of $20 million, the ICARE system was a way for scientists to examine their data through the aid of supercomputer visualizations. Using both graphical and modular methods, ICARE’s visualizations revealed and shared information in ways that traditional methods could not match.
The construction and implementation of the ICARE system was revolutionary to both the center and NASA as a whole. Before 1982, NASA already had an established interest in powerful computers; however, the ICARE system took NASA into the era of supercomputing. ICARE also brought increased attention to the value and power of scientific visualization.
Original Processing HardwareOriginal analog Graphics and Visualization Lab (GVIS) processing hardware.NASA ICARE RoomAn ICARE room in the Research and Analysis Center. NASA 1980s VisualizationA typical 1980s visualization at NASA’s Glenn Research Center in Cleveland.NASA GRAPH3DGRAPH3D was an innovative technology in the 1980s that supported shaded surfaces and had a rich set of user-friendly commands.NASA The Creation of GVIS
In 1989, it was time for an upgrade. NASA Glenn wanted the latest scientific visualization technology and techniques for its scientists, so the center expanded the Research Analysis Center to make room for the new Graphics and Visualization Lab (GVIS). The GVIS Lab acquired cutting-edge graphics technology, including studio-quality TV animation and recording equipment, stereographic displays, and image processing systems. Later, the High-Performance Computing Act of 1991 provided funding and opportunities to add high-speed computing, virtual reality, and collaborative visualization to its fleet of tools.
The secure supercomputing space that would eventually become the Graphics and Visualization Lab (GVIS), shown in 1989.NASA During this period, the GVIS Lab was responsible for assisting NASA Glenn scientists who needed help visualizing their data. The lab was also tasked with inventing new visualization techniques and promoting NASA Glenn’s activities though tours, videos, and other outreach programs. Some of the techniques the lab developed included particle tracking, iso-surface contours, and volume visualization. Tour guests included school children, corporate VIPs, local and national politicians, TV news media, and researchers from other national labs. Using state-of-the-art recording and editing hardware, the GVIS Lab regularly shared work both inside and outside of NASA.
As other labs and researchers began to gain access to their own scientific visualization tools, the GVIS Lab shifted its focus to experimenting with virtual reality- and augmented reality-based visualizations.
Jay HorowitzJay Horowitz saw the Graphics and Visualization Lab (GVIS) through its creation and early years at NASA’s Glenn Research Center in Cleveland. NASA Cray X-MP-2 SupercomputerThe Cray X-MP-2 Supercomputer that replaced the 1-S. NASA Early Research and Analysis CenterThe Research and Analysis Center pre-expansion. NASA Research and Analysis CenterThe Research and Analysis Center after the expansion. The Graphics and Visualization Lab (GVIS) is in the upper left corner. NASA Lewis Advanced Cluster Environment (LACE)The Advanced Computational Concepts Lab’s (ACCL) Lewis Advanced Cluster Environment (LACE) in 1993. NASA Mobile Aeronautics Education Laboratory (MAEL) VR Flight SimulatorSetup showing location of the various equipment used in the Mobile Aeronautics Education Laboratory (MAEL) VR Flight Simulator.NASA Mobile Aeronautics Education Laboratory (MAEL) VR Flight SimulatorMAEL (Mobile Aeronautics Education Laboratory) trailer’s flight simulator supported multi-screen panoramic views or head-tracked Head Mounted Displays (HMDs). NASA WrightSimApollo 13 flight director Gene Kranz watches Jim Lovell pilot WrightSim. NASA 100 Years of Flight Gala CelebrationJohn Glenn talks to a Graphics and Visualization Lab (GVIS) programmer during the 2003 “100 Years of Flight Gala Celebration” event at NASA’s Glenn Research Center in Cleveland. NASA VR TreadmillThe concept of the VR treadmill was used to test if duplicating a visual-motor linkage was feasible for long-duration spaceflight. NASA 2000s VisualizationTurn-of-the-century Graphics and Visualization Lab (GVIS) model. NASA 2000s VisualizationTurn-of-the-century Graphics and Visualization Lab (GVIS) model. NASA 2000s Visualization Turn-of-the-century Graphics and Visualization Lab (GVIS) model. NASA Aeroshark ClusterThe Advanced Computational Concepts Lab’s (ACCL) Aeroshark Cluster in 2001. NASA Early 2000s Graphics and Visualization Lab (GVIS)The turn-of-the-century Graphics and Visualization Lab (GVIS), shown in 2004. NASA Advanced Communications Environment (ACE) ClusterThe Advanced Computational Concepts Lab’s (ACCL) Advanced Communications Environment (ACE) Cluster in 2005. NASA Early Computer Automatic Virtual Environment (CAVE)A Graphics and Visualization Lab (GVIS) team member demonstrating the old Computer Automatic Virtual Environment (CAVE). NASA Current Computer Automatic Virtual Environment (CAVE)A Graphics and Visualization Lab (GVIS) intern in the Computer Automatic Virtual Environment (CAVE). NASA GVIS Now
Today, the GVIS Lab has the same mission that it had in 1989: to apply the latest visualization and human interaction technologies to advance NASA’s missions. The team takes pride in pushing the limits of scientific visualization and computer science, helping fellow researchers make sense of their data, and inspiring the next generation through demonstrations and presentations. Computational technology has come a long way since the days of ICARE, but GVIS has continued to explore current and cutting-edge technologies.
In addition to scientific visualization and experimental computational technologies, the GVIS Lab now also specializes in virtual design, interactive 3D simulations, natural user interface development, applications of computer science, and mission scenario visualizations. The team uses the latest edition of 3D programs and VR devices to experiment with how these systems can be used to visualize data, pushing their input and output capabilities.
With all this technology, GVIS also supports the visualization of a wide variety of 3D data and models such as CAD, point clouds, and volume data. Additionally, the lab is capable of high-impact data visualization, web-based visualization, time-accurate data representation, and designing and testing CAD models in virtual reality.
The Graphics and Visualization Lab (GVIS) team attends a STEM outreach event at the Cleveland Museum of Natural History.NASA Public Engagement
Outside of the lab, GVIS has a longstanding history of taking its technology demonstrations across the city, throughout the country, and around the world. The team has extensive experience organizing, presenting, and facilitating STEM-based educational outreach for a variety of different events and venues. Inside the lab, GVIS supports the education and career exploration of its high school and college interns through mentorship, community engagement opportunities, and access to cutting-edge technology.
STEM Engagement EventVisitors interact with the Graphics and Visualization Lab (GVIS) team while attending Score with STEM, an event organized by the Cleveland Cavaliers. NASA/GRC/Jef Janis STEM Engagement EventA visitor interacts with a Graphics and Visualization Lab (GVIS) team member while attending Dino Days at the Cleveland Museum of Natural History. NASA STEM Engagement EventA Graphics and Visualization Lab (GVIS) Intern interacts with visitors at a STEM outreach event. NASA STEM Engagement EventGraphics and Visualization Lab (GVIS) team members attend Women in Aviation Day organized by Women in Aviation International (WAI). NASA GRUVE Lab ToursThe Graphics and Visualization Lab (GVIS) team provides tours of NASA labs and facilities. NASA GVIS Lab ToursA Graphics and Visualization Lab (GVIS) team member demonstrates VR visualizations. NASA GRUVE Lab ToursVisitors interact with a visualization through the CAVE environment at the Graphics and Visualization Lab (GVIS). NASA Contact Us
Need to reach us? You can send an email directly to the GVIS Team (GRC-DL-GVIS@mail.nasa.gov) or to the team leader, Herb Schilling (hschilling@nasa.gov).
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Last Updated Jul 23, 2025 Related Terms
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