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NASA’s IXPE May Have Proven 90-Year-Old Theory

2026-08-05 18:49

4 min read

NASA’s IXPE May Have Proven 90-Year-Old Theory

A first of its kind measurement of a magnetar may have captured empty space behaving in a way physicists have predicted for 90 years, but never directly observed. The results published Wednesday in Nature.

An illustration of a bright blue, glowing neutron star against a black, starry background. Thin blue rings representing magnetic field lines loop around the star. A bright blue beam shoots diagonally downward to the left. On the right side, two semi-transparent cones emerge from the star, containing wavy lines representing radiation. The upper cone aligns with the magnetic field and shoots a bright white beam diagonally upward, while the lower, darker blue cone is offset and shoots a purple-blue beam straight out to the right.
This artist’s concept depicts magnetar 1E 1547.0-5408, a rapidly rotating neutron star with magnetic fields over a trillion times stronger than Earth’s. Blue curves emanating from the star’s two magnetic poles represent the magnetic field lines. The magnetar is a significant emitter of radio and X-ray radiation, with their peaks offset during its 2.1-second rotation period. This indicates the primary X-ray emitter is a secondary “hot spot” offset from the magnetic axis. These emitters are depicted as conical sections: the lighter blue radio emission peaks at the magnetic field’s symmetry axis, while the darker blue X-ray emission peaks below. The upper and lower emission cones show X-ray polarization degrees of 40% and 80%, respectively. These high values, along with smooth, coherent variations in polarization across the rotation period, provide the most definitive signal to date of vacuum birefringence a long-sought prediction of quantum electrodynamics.
NASA/Pablo Garcia

Fast facts

  • Magnetars are a special class of neutron stars with ultra-strong magnetic fields, the strongest of any object in the observable universe, around a trillion times stronger than the strongest permanent magnets ever built on Earth. These super magnetic neutron stars offer glimpses into the physics of intense environments that cannot be found anywhere else.
  • Neutron stars are the leftover cores of massive stars, formed at the end of their life cycles, that possess more mass than the Sun, condensed down to the size of a city, making them natural laboratories for studying extreme physics.

Scientists using NASA’s IXPE (Imaging X-ray Polarimetry Explorer) conducted more than 140 hours of observations of the magnetar 1E 1547-5408, between March and April 2025, alongside NASA’s NICER (Neutron Star Interior Composition Explorer) and Murriyang, CSIRO’s Parkes radio telescope, owned and operated by Australia’s national science agency. This was the first-ever coordinated radio and X-ray polarization measurement of a magnetar.

1E 1547-5408, spinning in a full rotation every 2 seconds, is a unique magnetar that consistently emits bright radio energy and X-ray light, for reasons scientists are still trying to understand.

Observations showed the polarization, or the orientation and level of alignment of the incoming photons, is nearly three times greater than seen in similar sources. This high level of polarization was surprising, since the geometry of the magnetar’s magnetic fields suggest that the measurements we see should be close to zero at certain points in the star. Standard surface emission models do not explain this large value either, indicating that another effect must be boosting the polarization.

Enter vacuum birefringence, a 90-year-old theory in the realm of quantum electrodynamics. First proposed in 1936, the theory suggests that the vacuum of space can be altered by extreme magnetic fields, far higher than those humans can create on Earth. Under such conditions, the vacuum acts like a lens or a prism, filtering light based on the direction it is traveling, therefore enhancing its total polarization. The IXPE mission’s ability to measure X-ray polarization was essential to test this theory.

Simulations performed by the research team support the possibility of vacuum birefringence causing the distinct signal. Hoa Dinh Thi, a postdoctoral associate at Rice University in Houston and co-lead author of the publication highlighting the results, said, “Our model suggests that reproducing the observed X-ray polarization signatures, while also satisfying the constraints set by radio observations, requires the presence of vacuum birefringence in the neutron star’s environment. This finding exemplifies how neutron stars enable us to test fundamental physics in environments not replicable in labs on Earth.”

The large polarization measurements from the magnetar give strong support to the theoretical prediction, and could be the first time this effect has been directly observed anywhere.

“This result truly highlights the interdisciplinary power of the field of astrophysics,” said Rachael Stewart, a Ph.D. candidate at George Washington University and lead author of the paper published in Nature. “The information we obtained from looking at this distant star core also gives us clues about the nature of the fabric of reality as we know it, and I find that to be incredible.”

Further IXPE observations of this source and other magnetars will confirm this signal and potentially reveal other exotic effects of quantum electrodynamics.

More about IXPE

The IXPE mission, which continues to provide unprecedented data enabling groundbreaking discoveries about celestial objects across the universe, is a joint NASA and Italian Space Agency mission with partners and science collaborators in 12 countries. It is led by NASA’s Marshall Space Flight Center in Huntsville, Alabama. Headquartered in Falls Church, Virginia, BAE Systems, Inc., manages spacecraft operations together with the University of Colorado’s Laboratory for Atmospheric and Space Physics in Boulder. Learn more about IXPE’s ongoing mission here: 

https://nasa.gov/ixpe

About the Author

Michael Allen

Michael Allen

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Last Updated

Aug 05, 2026

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Lee Mohon
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Joel Wallace
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Marshall Space Flight Center

Artemis III Orion Crew and Service Models Joined

2026-08-05 17:27

The Orion crew and service modules for Artemis III inside a large building with walkways and safety railings. Written on the floor in the foreground are the words "forklift prohibited."
NASA/Amanda Stevenson

Technicians joined the Orion crew and service modules together on July 30, 2026, inside the Neil Armstrong Operations and Checkout Building at NASA’s Kennedy Space Center in Florida.

The crew module will carry and sustain NASA astronauts Randy Bresnik, Andre Douglas, and Frank Rubio, and ESA (European Space Agency) astronaut Luca Parmitano, while the service module will power and propel Orion during the mission to test rendezvous and docking capabilities with test versions, or test articles, of commercial human landing systems from Blue Origin and SpaceX.

Read more about this milestone.

Image credit: NASA

NASA’s Perseverance Captures Phobos and Earth

2026-08-05 15:28

2 Min Read

NASA’s Perseverance Captures Phobos and Earth

A grainy black image showing a horizontal sequence of seven faint crescent shapes evenly spaced from left to right. A tiny bright white dot moves diagonally from the upper left to the lower right, appearing to pass behind the crescent shapes.

PIA26758

Credits:
NASA/JPL-Caltech/ASU/MSSS/SSI

Description

This composite of seven images from the Mastcam-Z instrument aboard NASA’s Perseverance Mars rover shows Earth, visible as a small bright dot moving from upper left to lower right, passing behind the Martian moon Phobos on July 2, 2026, 1,907th Martian day, or sol, of the mission.

The black background is the result of image processing that removed extraneous light in the background to enhance detail.

A desolate landscape with a dark horizon sits under a hazy, gray-blue sky. A large rectangular inset in the sky, connected by lines to a smaller rectangle, shows a sequence of five faint crescent shapes with a tiny bright dot moving downward.
Figure A

Figure A is an annotated composite of nine images taken by the Mastcam-Z instrument aboard Perseverance on July 2, 2026. The inset on the upper right, comprised of five images, shows Earth — the small bright dot moving from upper left to lower right — passing behind the Martian moon Phobos. 

The rectangle outlined at the left in the annotation indicates the patch of sky that was imaged several times to capture Earth passing behind Phobos. In the larger rectangular inset, the images captured from that patch of sky are displayed in time order from left to right, with Phobos moving up and Earth moving down. 

The gray of the Martian sky is the approximate true color of the twilight (about 40 minutes after sunset) on that sol. It is blue-gray lower, where it is brighter, and reddish gray above.

A dark horizon under a hazy gray-blue sky. A red-outlined rectangular inset, connected by lines to a smaller rectangle, shows five faint crescent shapes with a bright dot moving downward. Timecodes beneath each crescent indicate a span of 40 seconds.
Figure B

Figure B includes annotations showing the local solar time on Mars during which the five individual images that captured the occultation were taken. 

NASA’s Jet Propulsion Laboratory in Southern California, which is managed by Caltech, built and manages operations of the Perseverance rover on behalf of the agency’s Science Mission Directorate in Washington, as part of NASA’s Mars Exploration Program portfolio. Arizona State University leads the operations of the rover’s Mastcam-Z instrument, working in collaboration with Malin Space Science Systems in San Diego, on the design, fabrication, testing, and operation of the cameras.

For more about Perseverance:

science.nasa.gov/mission/mars-2020-perseverance/

NASA’s Perseverance Rover Watches Earth Vanish Behind Martian Moon

2026-08-05 15:25

3 min read

Preparations for Next Moonwalk Simulations Underway (and Underwater)

Earth and the Martian moon Phobos dance together in a series of images recently acquired by NASA’s Perseverance Mars rover. Earth appears as a point of light in the Martian sky, disappearing behind the crescent of Phobos, the larger of Mars’ two moons.

This is the first time humanity has captured from the surface of another planet an observation of Earth disappearing behind an object.

The image sequence was taken by the rover’s Mastcam-Z instrument at about 7 p.m. local solar time (the Martian evening time where the rover is located) on July 2, the 1,907th Martian day, or sol, of the mission. In the composite image, Earth travels from the upper left of the frame toward the lower right while Phobos, moving from lower left to upper right, sweeps across its path. In the third frame of the sequence, the two meet, and our planet winks out behind the little moon’s shadowed edge.

“The composite image makes for a unique Earth self-portrait, taken from the surface of another planet, with a Phobos photobomb,” said Justin Maki, the Mastcam-Z deputy principal investigator and imaging scientist for Perseverance at NASA’s Jet Propulsion Laboratory in Southern California.

From where Perseverance sits on the rim of Mars’ Jezero Crater, the two objects could hardly look more different. Phobos, a lumpy, potato-shaped moon about 17 miles (27 kilometers) across at its widest, orbits so close to Mars (4,850 miles, or 7,800 kilometers, away) that when the images were taken, Phobos appears roughly one-third the width of Earth’s Moon as seen from our planet. Some 195 million miles (314 million kilometers) away at the time, Earth is reduced to a single, pixel-size dot.

“Phobos crosses the Martian sky three times a day, and Earth is visible for months at a stretch, but catching one directly behind the other takes planning and a little luck,” said Mark Lemmon, a Mastcam-Z co-investigator at the Space Science Institute in Boulder, Colorado, who planned the observation and assembled the composite.

A grainy black image showing a horizontal sequence of seven faint crescent shapes evenly spaced from left to right. A tiny bright white dot moves diagonally from the upper left to the lower right, appearing to pass behind the crescent shapes.
This composite of seven images of Earth passing behind the Martian moon Phobos was acquired from data taken on July 2, 2026, 1,907th Martian day, or sol, of the mission. The black background is the result of image processing that removed extraneous light in the background to enhance detail.
NASA/JPL-Caltech/ASU/MSSS/SSI

Transits, occultations, eclipses

Astronomers call the event captured in this observation an occultation: when a larger-appearing body completely blocks the one behind it from the viewer’s standpoint. By contrast, an eclipse occurs when one object moves into the shadow of another. When the Moon passes through Earth’s shadow, it’s called a lunar eclipse; when one object that appears to be the same size as another blocks it, like when the Moon passes before the Sun, it’s known as a solar eclipse.

When the roles are reversed, with a smaller-looking object crossing the face of a larger-looking one, astronomers call that a transit. Perseverance has observed those, too: when Phobos or Deimos crosses the disk of the Sun as seen from Mars. These are sometimes described informally as “Martian solar eclipses.”

More about Perseverance

NASA’s Jet Propulsion Laboratory in Southern California, which is managed by Caltech, built and manages operations of the Perseverance rover on behalf of the agency’s Science Mission Directorate in Washington, as part of NASA’s Mars Exploration Program portfolio. Arizona State University leads the operations of the rover’s Mastcam-Z instrument, working in collaboration with Malin Space Science Systems in San Diego, on the design, fabrication, testing, and operation of the cameras.

For more about Perseverance:

https://science.nasa.gov/mission/mars-2020-perseverance

News Media Contacts

DC Agle
 
Jet Propulsion Laboratory, Pasadena, Calif.
818-393-9011

agle@jpl.nasa.gov 

Karen Fox / Alana Johnson
NASA Headquarters, Washington 
240-285-5155 / 202-672-4780
karen.c.fox@nasa.gov / alana.r.johnson@nasa.gov 

2026-054

Advanced Mini-laboratories Automate Space Station Research

2026-08-05 14:00

2 Min Read

Advanced Mini-laboratories Automate Space Station Research

NASA astronaut and Expedition 71 Flight Engineer Tracy C. Dyson swaps out sample processors for the Pharmaceutical In-space Laboratory experiment that is exploring the production and manufacturing of medicines to benefit astronauts in space and humans on Earth. The processors were installed in the Advanced Space Experiment Processor, or ADSEP, that can process a variety of research samples and be delivered to the International Space Station and returned to Earth aboard the SpaceX Dragon cargo craft.
NASA astronaut Tracy C. Dyson swaps out sample processors in the Advanced Space Experiment Processor (ADSEP).
Credits: NASA

The International Space Station hosts hundreds of science experiments at a time. Some experiments can take hours to perform, and researchers need to account for astronauts’ limited time. Fully automated devices, like Redwire’s  ADvanced Space Experiment Processors (ADSEPs), have been designed to conduct more space science with less crew time.

Within each ADSEP facility there are three to four “mini-laboratories”, called cassettes, that allow multiple studies with different needs to be performed at the same time. The latest model, ADSEP-4 can accommodate four cassettes and features imagery capabilities. Since 2017, ADSEPs have conducted and supported two dozen investigations aboard space station with new ones on the horizon.

Close-up microscope image of transparent, hexagonal and cubic crystals against a warm orange-pink background.
Crystals are grown aboard the International Space Station as part of ADSEP-PIL-02, an investigation that aims to study the effects of microgravity on various types of crystals.
Redwire

The latest ADSEP investigations are related to growing seed crystals in space, which can be used to reformulate existing drugs or develop entirely new therapeutics. Previous experiments have shown that the unique microgravity environment allows the growth of larger and higher quality crystals. With Redwire’s Pharmaceutical In-Space Laboratory (PIL-BOX), a cassette-based system that uses the ADSEP facility, researchers can grow improved, space-grown seed crystals.

Adenot, wearing light blue polo shirt and black cargo pants, smiles as she holds a gray cassette the size of a lunchbox. The surrounding walls, ceiling, and floor are covered with cables, cameras, laptops, storage bags, and research equipment.
European Space Agency (ESA) astronaut Sophie Adenot displays a cassette for the ADvanced Space Experiment Processor (ADSEP).
NASA

Notable PIL-BOX experiments sponsored by the ISS National Laboratory have focused on cancer research. The ADSEP-PIL-10 investigation, currently being conducted in orbit in collaboration with the Aspera Biomedicines, works to crystallize cancer-blocking and cancer-promoting molecules with the goal of creating an oral cancer medication. ADSEP-PIL-15 crystalized cancer-treating medicines to help refine production, quality, and stability of these cancer drugs. A recent technology demonstration, ADSEP- ICC (Industrial Crystallization Cassette), tested a larger cassette to expand ADSEP function and scale crystallization production for commercial use.

Image of several juvenile bobtail squid suspended in water against a light background. The small, translucent squid have rounded, oblong bodies covered with tiny brown pigment spots and have tiny tentacles extending just below their round black eyes. Four squid are in the forefront in focus while several others are blurred in the background.
Juvenile bobtail squid swimming in seawater just after hatching as part of the ADSEP-UMAMI investigation.
University of Florida

ADSEPs are not limited to crystal growth and can also be used for culturing cells and tissues, studying organisms, and researching materials-sciences. In 2021, ADSEP-UMAMI studied how bobtail squid interacted with beneficial microbes in the space environment. This research found that symbiotic interactions with microbes can lessen a host animal’s stress responses caused by spaceflight and accelerate developmental pathways such as growing neurons and tissues. These findings give insight into the importance of symbiotic relationships in closed ecosystems like spacecraft and have implications for astronauts and their own beneficial bacteria during space missions.

The automation and versatility of ADSEPs permit a wide array of science experiments to be conducted aboard the orbiting laboratory, leading to findings that inform future space missions and are beneficial to people on Earth.

TechCrunch - Latest

Get up to $400 off your TechCrunch Disrupt 2026 pass until Friday

2026-08-05 22:55

Starting today, you can take an additional $100 off your founder, investor, or attendee TechCrunch Disrupt 2026 pass, which is a nice bonus on top of our current discounted pricing. 
Nikita Bier steps down as X’s head of product

2026-08-05 21:30

The serial entrepreneur is stepping down a little over a year after taking the "24/7 job" of overseeing X.
Travis Kalanick’s robotics startup Atoms taps former Uber finance chief as CFO

2026-08-05 21:26

Kalanick continues to get the band back together, after acquiring Anthony Levandowski's autonomy startup, and even soliciting investment from Uber.
Meta launches Muse Code, an AI agent for large code bases

2026-08-05 21:21

Meta expanded its AI coding offerings with a new agent that, it promises, can handle complex tasks with complex software.
Trump’s DOJ gains oversight of OpenAI’s green-card employee sponsorships

2026-08-05 21:05

The DOJ alleged that OpenAI did not meaningful attempt to hire U.S. citizens before seeking permanent residence for Visa-holding employees.
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