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Explore This Section Webb News Latest News Latest Images Blog (offsite) 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 5 Min Read NASA Webb Explores Effect of Strong Magnetic Fields on Star Formation
An image of the Milky Way captured by the MeerKAT radio telescope array puts the James Webb Space Telescope’s image of the Sagittarius C region in context. Full image below. Credits:
NASA, ESA, CSA, STScI, SARAO, Samuel Crowe (UVA), John Bally (CU), Ruben Fedriani (IAA-CSIC), Ian Heywood (Oxford) Follow-up research on a 2023 image of the Sagittarius C stellar nursery in the heart of our Milky Way galaxy, captured by NASA’s James Webb Space Telescope, has revealed ejections from still-forming protostars and insights into the impact of strong magnetic fields on interstellar gas and the life cycle of stars.
“A big question in the Central Molecular Zone of our galaxy has been, if there is so much dense gas and cosmic dust here, and we know that stars form in such clouds, why are so few stars born here?” said astrophysicist John Bally of the University of Colorado Boulder, one of the principal investigators. “Now, for the first time, we are seeing directly that strong magnetic fields may play an important role in suppressing star formation, even at small scales.”
Detailed study of stars in this crowded, dusty region has been limited, but Webb’s advanced near-infrared instruments have allowed astronomers to see through the clouds to study young stars like never before.
“The extreme environment of the galactic center is a fascinating place to put star formation theories to the test, and the infrared capabilities of NASA’s James Webb Space Telescope provide the opportunity to build on past important observations from ground-based telescopes like ALMA and MeerKAT,” said Samuel Crowe, another principal investigator on the research, a senior undergraduate at the University of Virginia and a 2025 Rhodes Scholar.
Bally and Crowe each led a paper published in The Astrophysical Journal.
Image A: Milky Way Center (MeerKAT and Webb)
An image of the Milky Way captured by the MeerKAT (formerly the Karoo Array Telescope) radio telescope array puts the James Webb Space Telescope’s image of the Sagittarius C region in context. Like a super-long exposure photograph, MeerKAT shows the bubble-like remnants of supernovas that exploded over millennia, capturing the dynamic nature of the Milky Way’s chaotic core. At the center of the MeerKAT image the region surrounding the Milky Way’s supermassive black hole blazes bright. Huge vertical filamentary structures echo those captured on a smaller scale by Webb in Sagittarius C’s blue-green hydrogen cloud. NASA, ESA, CSA, STScI, SARAO, Samuel Crowe (UVA), John Bally (CU), Ruben Fedriani (IAA-CSIC), Ian Heywood (Oxford) Image B: Milky Way Center (MeerKAT and Webb), Labeled
The star-forming region Sagittarius C, captured by the James Webb Space Telescope, is about 200 light-years from the Milky Way’s central supermassive black hole, Sagittarius A*. The spectral index at the lower left shows how color was assigned to the radio data to create the image. On the negative end, there is non-thermal emission, stimulated by electrons spiraling around magnetic field lines. On the positive side, thermal emission is coming from hot, ionized plasma. For Webb, color is assigned by shifting the infrared spectrum to visible light colors. The shortest infrared wavelengths are bluer, and the longer wavelengths appear more red. NASA, ESA, CSA, STScI, SARAO, Samuel Crowe (UVA), John Bally (CU), Ruben Fedriani (IAA-CSIC), Ian Heywood (Oxford) Using Infrared to Reveal Forming Stars
In Sagittarius C’s brightest cluster, the researchers confirmed the tentative finding from the Atacama Large Millimeter Array (ALMA) that two massive stars are forming there. Along with infrared data from NASA’s retired Spitzer Space Telescope and SOFIA (Stratospheric Observatory for Infrared Astronomy) mission, as well as the Herschel Space Observatory, they used Webb to determine that each of the massive protostars is already more than 20 times the mass of the Sun. Webb also revealed the bright outflows powered by each protostar.
Even more challenging is finding low-mass protostars, still shrouded in cocoons of cosmic dust. Researchers compared Webb’s data with ALMA’s past observations to identify five likely low-mass protostar candidates.
The team also identified 88 features that appear to be shocked hydrogen gas, where material being blasted out in jets from young stars impacts the surrounding gas cloud. Analysis of these features led to the discovery of a new star-forming cloud, distinct from the main Sagittarius C cloud, hosting at least two protostars powering their own jets.
“Outflows from forming stars in Sagittarius C have been hinted at in past observations, but this is the first time we’ve been able to confirm them in infrared light. It’s very exciting to see, because there is still a lot we don’t know about star formation, especially in the Central Molecular Zone, and it’s so important to how the universe works,” said Crowe.
Magnetic Fields and Star Formation
Webb’s 2023 image of Sagittarius C showed dozens of distinctive filaments in a region of hot hydrogen plasma surrounding the main star-forming cloud. New analysis by Bally and his team has led them to hypothesize that the filaments are shaped by magnetic fields, which have also been observed in the past by the ground-based observatories ALMA and MeerKAT (formerly the Karoo Array Telescope).
“The motion of gas swirling in the extreme tidal forces of the Milky Way’s supermassive black hole, Sagittarius A*, can stretch and amplify the surrounding magnetic fields. Those fields, in turn, are shaping the plasma in Sagittarius C,” said Bally.
The researchers think that the magnetic forces in the galactic center may be strong enough to keep the plasma from spreading, instead confining it into the concentrated filaments seen in the Webb image. These strong magnetic fields may also resist the gravity that would typically cause dense clouds of gas and dust to collapse and forge stars, explaining Sagittarius C’s lower-than-expected star formation rate.
“This is an exciting area for future research, as the influence of strong magnetic fields, in the center of our galaxy or other galaxies, on stellar ecology has not been fully considered,” said Crowe.
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).
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Media Contacts
Laura Betz – laura.e.betz@nasa.gov
NASA’s Goddard Space Flight Center, Greenbelt, Md.
Leah Ramsay – lramsay@stsci.edu
Space Telescope Science Institute, Baltimore, Md.
Christine Pulliam – cpulliam@stsci.edu
Space Telescope Science Institute, Baltimore, Md.
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Last Updated Apr 02, 2025 Editor Marty McCoy Contact Laura Betz laura.e.betz@nasa.gov 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 5 min read
Sols 4473-4474: So Many Rocks, So Many Textures!
NASA’s Mars rover Curiosity acquired this image using its Chemistry & Camera (ChemCam) of a boulder about 40 meters (about 131 feet) away from the rover at the time. Curiosity acquired the image, showing the variety of structures and textures around the rover, on March 5, 2025 — sol 4471, or Martian day 4,471 of the Mars Science Laboratory mission — at 01:47:03 UTC. NASA/JPL-Caltech/LANL Written by Susanne Schwenzer, Planetary Geologist at The Open University
Earth planning date: Wednesday, March 5, 2025
The Martian landscape never ceases to amaze me, there is so much variation in texture and color! As a mineralogist, I marvel at them, but my colleagues trained in sedimentology regularly teach me how to see even more than the beauty of them: they can discern whether the materials that make up a rock were transported and laid down by the action of water or wind. The image above shows a rather unusual texture alongside more normal-looking laminated rocks. Just compare the small, brighter block in the foreground with the darker bigger rock in the center of the image. How should we interpret it? Well, that jury is still out. Are they sedimentary textures formed when the rock first was laid down, or shortly after, or are they textures that formed much later when water entered the rock and formed new minerals in the already existing rock? The latter would be more my area of research, and they are often called concretions. And I vividly remember the first concretions a rover ever found, the “blueberries.” Curiosity, of course, found many concretions, too. There is an interesting comparison between rocks that the Mars Exploration rover Opportunity found, and the one that Curiosity found very early in the mission, back at Yellowknife Bay. We have seen many more since, and the above might be another example.
The landscape directly around the rover today also has some interesting textures and, most important, some more regular-looking bedrock targets. Bedrock is what the team perceives to be the rocks that make up the part of the hill we are driving through. The dark blocks, like the one above, that are also strewn occasionally in the path of the rover are called float rocks, and we always look higher up into the hills to find out where they might have come from. As interesting as all those blocks and boulders are, they pose a huge challenge for the rover drivers. Today, they had managed to get us all the way to the intended stopping point, which in itself is a huge achievement. A mixture of large rocks and sand is just not conducive to any form of travel, and I always wonder how tiring it would be to just walk through the area. But we made it to the intended stopping point, driving just under 20 meters (about 65 feet), as intended. Unfortunately though, one of the rover’s wheels was perched on a rock in ways that posed a risk of dropping off that rock during an arm move. So, as is usual in those cases, we accept that contact science is not possible. The risk would just be too great that the rover moves just at the wrong moment and the arm bumps into the rock that an instrument is investigating at that moment. So, safety first, we decided to keep the arm tucked in and focus on remote science.
The team quickly pivoted to add some remote science to the already existing observations. As you might imagine in a terrain as interesting as this, Mastcam did get a workout. There are seven different observations in the plan! It looks into the distance to the Texoli Butte we are observing as we drive along it, and at a target, “Brown Mountain.” Looking into the many different features are also imaging activities on the targets “Placerita Canyon,” “Humber Park,” and two others just named “trough,” which is a descriptive term for little trough features the team is tracking for a while with the quest to better understand their formation. ChemCam has a LIBS investigation on target “Inspiration Point,” and two long-distance RMI (Remote Micro Imager) observations. One is truly at a long distance on Gould Mesa, another of the mounts we are observing as we go along. There is another RMI activity closer to the rover, to investigate more of those very interesting structures.
We also have environmental observations in the plan, observing the opacity of the atmosphere and of REMS investigations are occurring throughout the plan. REMS is our “weather station” measuring atmospheric pressure, temperature, humidity, winds, and ultraviolet radiation levels. DAN looks at the surface to measure the water and chlorine content in the rocks that the rover traverses over and RAD is looking up to the sky to measure the radiation that reaches the Martian surface. We do not often mention those in our blocks, because we are so used to seeing them there every single sol, doing their job, quietly in the background.
With so much to do, the only remaining question was where to drive. That was discussed at length, weighing the different science reasons to go to places along the path, and after much deliberation we decided to go to one of the float rocks, but reserve the option to make a right turn in the next plan, to get to another interesting place. All those discussions are so important to make sure we are making the most of the power we have at this cold time of the year, and getting all the science we can get. I am excited to see the data from today’s plan… and to find out where we end up. Not with a wheel on a rock, please, Mars — that would be a good start. But if we do, I am absolutely confident there will be lots to investigate anyway!
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Last Updated Mar 06, 2025 Related Terms
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By NASA
A SpaceX Falcon 9 rocket stands vertical on Tuesday, Feb. 25, 2025, at Launch Complex 39A at NASA’s Kennedy Space Center ahead of Intuitive Machines’ IM-2 mission as part of the agency’s Commercial Lunar Payload Services initiative and Artemis campaign. SpaceX Sending instruments to the Moon supports a growing lunar economy on and off Earth, and the next flight of NASA science and technology is only days away. NASA’s CLPS (Commercial Lunar Payload Services) initiative is a lunar delivery service that sends NASA science and technology instruments to various geographic locations on the Moon using American companies. These rapid, cost-effective commercial lunar missions at a cadence of about two per year improve our understanding of the lunar environment in advance of future crewed missions to the Moon as part of the agency’s broader Artemis campaign.
Of the 11 active CLPS contracts, there have been three CLPS launches to date: Astrobotic’s Peregrine Mission One, which collected data in transit but experienced an anomaly that prevented it from landing on the Moon; Intuitive Machines’ IM-1 mission, which landed, tipped over, and operated on the lunar surface; and Firefly Aerospace’s Blue Ghost Mission One that is currently enroute and scheduled to land in early March 2025. The CLPS contract awards cover end-to-end commercial payload delivery services, including payload integration, launch from Earth, landing on the surface of the Moon, and mission operations.
NASA’s fourth CLPS flight is from Intuitive Machines with their IM-2 mission. The IM-2 mission is carrying NASA science and technology instruments to Mons Mouton, a lunar plateau just outside of 5 degrees of the South Pole of the Moon, closer to the pole than any preceding lunar mission.
Scheduled to launch no earlier than Wednesday and land approximately eight days later, Intuitive Machines’ Nova-C lander, named Athena, will carry three NASA instruments to the lunar South Pole region – the Polar Resources Ice Mining Experiment-1 (PRIME-1) suite and the Laser Retroreflector Array (LRA).
The PRIME-1 suite consists of two instruments, the TRIDENT drill (The Regolith Ice Drill for Exploring New Terrain) and MSolo (Mass Spectrometer observing lunar operations), which will work together to extricate lunar soil samples, known as regolith, from the subsurface and analyze their composition to further understand the lunar environment and gain insight on potential resources that can be extracted for future examination.
The meter-long TRIDENT drill is designed to extract lunar regolith, up to about three feet below the surface. It will also measure soil temperature at varying depths below the surface, which will help to verify existing lunar thermal models that are used for ice stability calculations and resource mapping. By drilling into the lunar regolith, information is gathered to help answer questions about the lunar regolith geotechnical properties, such as soil strength, both at the surface and in the subsurface that will help inform Artemis infrastructure objectives. The data will be beneficial when designing future systems for on-site resource utilization that will use local resources to create everything from landing pads to rocket fuel. The lead development organization for TRIDENT is Honeybee Robotics, a Blue Origin Company.
The MSOLO instrument is a mass spectrometer capable of identifying and quantifying volatiles (or gasses that easily evaporate) found at or beneath the lunar surface, including– if it’s present in the regolith within the drill’s reach – water and oxygen, brought to the surface by the TRIDENT drill. This instrument can also detect any gases that emanate from the lander, drilling process, and other payloads conducting operations on the surface. Using MSolo to study the volatile gases found on the Moon can help us understand how the lander’s presence might alter the local environment. The lead development organization is INFICON of Syracuse, New York, in partnership with NASA’s Kennedy Space Center in Florida.
NASA’s LRA is a collection of eight retroreflectors that enable precision laser ranging, which is a measurement of the distance between the orbiting or landing spacecraft to the reflector on the lander. The LRA instrument is passive, meaning it does not power on. It will function as a permanent location marker on the Moon for decades to come, similar to its predecessors. The lead development organization is NASA’s Goddard Space Flight Center in Greenbelt, Maryland.
In addition to the CLPS instruments, two technology demonstrations aboard IM-2 were developed through NASA’s Tipping Point opportunity. These are collaborations with the agency’s Space Technology Mission Directorate and industry that support development of commercial space capabilities and benefit future NASA missions.
Intuitive Machines developed a small hopping robot, Grace, named after Grace Hopper, computer scientist and mathematician. Grace will deploy as a secondary payload from the lander and enable high-resolution imaging and science surveying of the lunar surface, including permanently shadowed craters around the landing site. Grace is designed to bypass obstacles such as steep inclines, boulders, and craters to cover a lot of terrain while moving quickly, which is a valuable capability to support future missions on the Moon and other planets, including Mars.
Nokia will test a Lunar Surface Communications System that employs the same cellular technology here on Earth. Reconceptualized by Nokia Bell Labs to meet the unique requirements of a lunar mission, this tipping point technology aims to demonstrate proximity communications between the lander, a Lunar Outpost rover, and the hopper.
Launching as a rideshare alongside the IM-2 mission, NASA’s Lunar Trailblazer spacecraft also will begin its journey to lunar orbit where it will map the distribution of water – and other forms of water – on the Moon.
Future CLPS flights will continue to send payloads to the near side, far side, and South Pole regions of the Moon where investigations and exploration are informed by each area’s unique characteristics. With a pool of 13 American companies under CLPS, including a portfolio of 11 lunar deliveries by five vendors sending more than 50 individual science and technology instruments to lunar orbit and the surface of the Moon, NASA continues to advance long-term exploration of the Moon, and beyond to Mars.
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By NASA
5 Min Read NASA’s EZIE Launching to Study Magnetic Fingerprints of Earth’s Aurora
High above Earth’s poles, intense electrical currents called electrojets flow through the upper atmosphere when auroras glow in the sky. These auroral electrojets push about a million amps of electrical charge around the poles every second. They can create some of the largest magnetic disturbances on the ground, and rapid changes in the currents can lead to effects such as power outages. In March, NASA plans to launch its EZIE (Electrojet Zeeman Imaging Explorer) mission to learn more about these powerful currents, in the hopes of ultimately mitigating the effects of such space weather for humans on Earth.
Results from EZIE will help NASA better understand the dynamics of the Earth-Sun connection and help improve predictions of hazardous space weather that can harm astronauts, interfere with satellites, and trigger power outages.
The EZIE mission includes three CubeSats, each about the size of a carry-on suitcase. These small satellites will fly in a pearls-on-a-string formation, following each other as they orbit Earth from pole to pole about 350 miles (550 kilometers) overhead. The spacecraft will look down toward the electrojets, which flow about 60 miles (100 kilometers) above the ground in an electrified layer of Earth’s atmosphere called the ionosphere.
During every orbit, each EZIE spacecraft will map the electrojets to uncover their structure and evolution. The spacecraft will fly over the same region 2 to 10 minutes apart from one another, revealing how the electrojets change.
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NASA’s EZIE (Electrojet Zeeman Imaging Explorer) mission will use three CubeSats to map Earth’s auroral electrojets — intense electric currents that flow high above Earth’s polar regions when auroras glow in the sky. As the trio orbits Earth, each satellite will use four dishes pointed at different angles to measure magnetic fields created by the electrojets. NASA/Johns Hopkins APL/Steve Gribben Previous ground-based experiments and spacecraft have observed auroral electrojets, which are a small part of a vast electric circuit that extends 100,000 miles (160,000 kilometers) from Earth to space. But for decades, scientists have debated what the overall system looks like and how it evolves. The mission team expects EZIE to resolve that debate.
“What EZIE does is unique,” said Larry Kepko, EZIE mission scientist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. “EZIE is the first mission dedicated exclusively to studying the electrojets, and it does so with a completely new measurement technique.”
EZIE is the first mission dedicated exclusively to studying the electrojets.
Larry Kepko
EZIE mission scientist, NASA’s Goddard Space Flight Center
This technique involves looking at microwave emission from oxygen molecules about 10 miles (16 kilometers) below the electrojets. Normally, oxygen molecules emit microwaves at a frequency of 118 Gigahertz. However, the electrojets create a magnetic field that can split apart that 118 Gigahertz emission line in a process called Zeeman splitting. The stronger the magnetic field, the farther apart the line is split.
Each of the three EZIE spacecraft will carry an instrument called the Microwave Electrojet Magnetogram to observe the Zeeman effect and measure the strength and direction of the electrojets’ magnetic fields. Built by NASA’s Jet Propulsion Laboratory (JPL) in Southern California, each of these instruments will use four antennas pointed at different angles to survey the magnetic fields along four different tracks as EZIE orbits.
The technology used in the Microwave Electrojet Magnetograms was originally developed to study Earth’s atmosphere and weather systems. Engineers at JPL had reduced the size of the radio detectors so they could fit on small satellites, including NASA’s TEMPEST-D and CubeRRT missions, and improved the components that separate light into specific wavelengths.
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NASA’s EZIE (Electrojet Zeeman Imaging Explorer) mission will investigate Earth’s auroral electrojets, which flow high above Earth’s polar regions when auroras (northern and southern lights) glow. By providing unprecedented measurements of these electrical currents, EZIE will answer decades-old mysteries. Understanding these currents will also improve scientists’ capabilities for predicting hazardous space weather. NASA/Johns Hopkins APL The electrojets flow through a region that is difficult to study directly, as it’s too high for scientific balloons to reach but too low for satellites to dwell.
“The utilization of the Zeeman technique to remotely map current-induced magnetic fields is really a game-changing approach to get these measurements at an altitude that is notoriously difficult to measure,” said Sam Yee, EZIE’s principal investigator at the Johns Hopkins Applied Physics Laboratory (APL) in Laurel, Maryland.
The mission is also including citizen scientists to enhance its research, distributing dozens of EZIE-Mag magnetometer kits to students in the U.S. and volunteers around the world to compare EZIE’s observations to those from Earth. “EZIE scientists will be collecting magnetic field data from above, and the students will be collecting magnetic field data from the ground,” said Nelli Mosavi-Hoyer, EZIE project manager at APL.
EZIE scientists will be collecting magnetic field data from above, and the students will be collecting magnetic field data from the ground.
Nelli Mosavi-Hoyer
EZIE project manager, Johns Hopkins Applied Physics Laboratory
The EZIE spacecraft will launch aboard a SpaceX Falcon 9 rocket from Vandenberg Space Force Base in California as part of the Transporter-13 rideshare mission with SpaceX via launch integrator Maverick Space Systems.
The mission will launch during what’s known as solar maximum — a phase during the 11-year solar cycle when the Sun’s activity is stronger and more frequent. This is an advantage for EZIE’s science.
“It’s better to launch during solar max,” Kepko said. “The electrojets respond directly to solar activity.”
The EZIE mission will also work alongside other NASA heliophysics missions, including PUNCH (Polarimeter to Unify the Corona and Heliosphere), launching in late February to study how material in the Sun’s outer atmosphere becomes the solar wind.
According to Yee, EZIE’s CubeSat mission not only allows scientists to address compelling questions that have not been able to answer for decades but also demonstrates that great science can be achieved cost-effectively.
“We’re leveraging the new capability of CubeSats,” Kepko added. “This is a mission that couldn’t have flown a decade ago. It’s pushing the envelope of what is possible, all on a small satellite. It’s exciting to think about what we will discover.”
The EZIE mission is funded by the Heliophysics Division within NASA’s Science Mission Directorate and is managed by the Explorers Program Office at NASA Goddard. APL leads the mission for NASA. Blue Canyon Technologies in Boulder, Colorado, built the CubeSats.
by Vanessa Thomas
NASA’s Goddard Space Flight Center, Greenbelt, Md.
Header Image:
An artist’s concept shows the three EZIE satellites orbiting Earth.
Credits: NASA/Johns Hopkins APL/Steve Gribben
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Last Updated Feb 25, 2025 Related Terms
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In a landmark achievement, ESA successfully migrated Galileo’s Control Centres in a highly complex operation involving over 200 people from the Agency, industry and EUSPA. This milestone marked the beginning of a global operation to upgrade Galileo’s entire Ground Segment, a vast network of stations spread around the world.
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