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Showing posts sorted by date for query ORDER OF THE NINE ANGLES. Sort by relevance Show all posts

Sunday, June 07, 2026

Emperor of Iceland, Titan of the Tutu


 June 5, 2026

Ensemble of the Staatsballett Berlin in George Balanchine’s choreography of Georges Bizet’s Symphony in C. Photo: Carlos Quezada.

With a first name that advertises its kinship with marauding Nordic forbears and sporting a rakish diacritic at the start of the patronymic that follows, the pianist Vikingur Ólafsson got a head start on his brand right from the get-go—perhaps at the baptismal font soon after his birth in February of 1984.

That brand now belongs to one of Iceland’s biggest musical exports, though Ólafsson is not exactly right up there with Björk, the wraith-like pop star and actor who has tallied some 40 million global record sales. The pianist’s 2019 album with the lapidary title, Johann Sebastian Bach, has pushed into six-figure territory for CDs and LPs; more impressive still, the total number of streams is reported to be beyond a billion. Ólafsson’s Goldberg Variations followed in 2022 and approached the 100 million mark.

These Bachian offerings take their place in a diverse discography that runs from the baroque past to the minimalist present, from Jean-Philippe Rameau (a couple of years older than Bach) to Philip Glass (at nearly 90, still composing—and thumbing his nose at Donald Trump).

These smartly conceived and scrupulously executed albums are issued on classical music’s most prestigious label, Deutsche Grammophon. Go to that venerable company’s website and you will be treated to a masterclass in hyper-curation. There, the algal-green of Ólafsson’s velvet suit counterpoints with the splendid species of Icelandic moss on which he lies. His collar has been turned up so as to protect his pale neck from the sub-Arctic wind, even though not the slightest breeze appears to ruffle his meticulously coiffed brown hair, as lush as the Nature’s pillow that it touches. Turned onto his shoulder and towards the visitor, he makes bedroom eyes through round, professorial spectacles that want to, but won’t let themselves, glint in the northern-latitude light.

Troll further through the groves and gullies of the Deutsche Grammophon ecosystem and into its upscale habitations and you can eavesdrop and ogle as Ólafsson plays dreamy Schubert, Beethoven, and Bach in remote modernist villas of concrete and glass, their super-stylish interiors accoutered with furniture and objets by the latest Nordic designers. Near a polished black Steinway, the flames in a high-efficiency wood stove dance to the music he exquisitely makes. Among Ólafsson’s many artistic achievements, the most lasting is to have elevated Bach’s music to a lifestyle choice.

I don’t know if the pianist blew into Berlin from his home in Reykjavik for the weekend’s run of three concerts with the Berlin Philharmonic that included his flawless, if somewhat circumspect, performance of Beethoven’s Piano Concerto No. 5—nicknamed “The Emperor”—under the direction of guest conductor Semyon Bychkov. The sobriquet derives from the grandly heroic themes and the work’s rousing mix of contest and cooperation with the orchestral forces. The concert stage becomes both a temple of oratory and a battlefield, and Ólafsson, wearing a bow tie and black velvet jacket highlighted by the trademark colorful kerchief in his breast pocket, imbues the Emperor’s main theme with commanding authority and sallied through the swashbuckling arpeggios, galloping octaves, and dashing double trills with unerring resolve. After completing these various maneuvers—a veritable keyboard decathlon—he would throw up his hands in grand arcs and toss back his head (and with it his excellent hair) in gestures more balletic than martial.

Having impressed, if not exactly conquered, in the three flats of the opening E-flat-major Allegro, Ólafsson drew the packed audience in for an intimate fireside chat in four sharps for the B-major second movement, the piano’s reverie accompanied by muted strings. The key is simultaneously close by yet impossibly far away from that of the outer movements, and Ólafsson would have been happy to stay at its glowing hearth for much longer. But that inevitable half-step slide from a B-natural to a B-flat by the bassoon broke the spell. The finale’s romp was fast, but not furious, more exercise than ecstatic celebration. A solo encore was demanded and delivered—a transcription of Bach’s Air on the G String. This freeze-dried chestnut flaked and crumbled as it was warmed under Ólafsson’s ginger touch. Never has cliché been so fragile.

After the intermission, a far more harrowing heroism followed with Shostakovich’s Fifth Symphony. Whereas Bychkov seemed to be a rather dutiful field officer in the concerto and in Beethoven’s blood-curdling Coriolan Overture that had opened the concert, he rose to, and beyond, the physical and emotional challenges of his older compatriot’s forty-five-minute epic. Premiered in Leningrad in 1937, Shostakovich’s Fifth Symphony marked the composer’s return, if temporarily, to official favor after he had run afoul of state authorities with his notorious opera, Lady Macbeth of the Mtsensk District, three years earlier.

Bychkov fled the Soviet Union in 1974 and emigrated to the United States the next year at the age of twenty-two, but he never left the Russian masterpieces. Conducting from memory, he proved that the European symphonic tradition courses through his veins and through this work, in which Mahler is quoted, Bach-like canons are brandished, Beethoven’s ghost continually appears, and ultimately triumphs in the dauntless fourth-movement finale.

I sat in the benches just behind the orchestra in this hall-in-the-round. From there, Bychkov’s face was front and center, and I could see it contorting and grimacing against Shostakovich’s shifting harmonies, searing dissonances, and blasting brass. Bychkov was wide-eyed at the outbreaks of mischief (as in the third-movement scherzo), stern against the military snap of the snare drum, and mournful in the repose—or is it despair?—at the end of the Largo, before setting his jaw for the concluding call to arms.

The ultimate victory is proclaimed by a mighty gong that had been silent for nearly three-quarters of an hour. Cymbals crashed and the timpani barrage buffeted the massed tutti. Was this fortissimo bombardment a statement of moral principle, artistic aggression, or a strategic calculation according to which the best offense is a good defense? Maybe a musical masterpiece such as this can be all these things at once.

In the immediate aftermath of the Shostakovich storm, silence reigned, but not calm. Red-faced and sweat-drenched, his hands frozen in front of him as if clinging to the vanishing echo of an entire symphony, Bychkov stood, stooped and motionless, ready to expire at the moment of demobilization. But then, after an epic, unwritten fermata obeyed in unison by audience and orchestra, the conductor breathed again and the applause exploded. The septuagenarian maestro mustered a resigned smile and began the ritual acknowledgment of applause and the meting out of honors to the soloists and sections and to the whole orchestral regiment.

After these hyper-heroics on Friday in the Philharmonie, Saturday night brought beauty and transgression from the Staatsballett in a performance at the State Opera House of a canonical work by George Balanchine (another Russian emigrant to the United States), followed by the premiere of a piece by the Berlin company’s artistic director, Christian Spuck.

Prompted by his friend Igor Stravinsky, Balanchine chose Georges Bizet’s four-movement Symphony in C for his authoritative exhibition of ensemble synchronization, inventive and assured partnering, and kaleidoscopic solo virtuosity in which athleticism is transformed into an aesthetic act. The teenage Bizet’s emulation of the Viennese greats of the previous century (Mozart and Haydn) served as the perfect vehicle for Balanchine’s comprehensive neoclassical choreography. The balanced phrasing, profiled succession of motives, larger architectural structures, and facile craftsmanship of Bizet’s essay in emulation allowed Balanchine to put his famous dictum—“See the music, hear the dance”—into dazzling practice when the work debuted in Paris in 1947.

The stringent yet supple style he imposed on his female dancers was no longer to be hidden behind flowing diaphanous garments that extended even below the knee. So, Balanchine, working with his costume designer Barbara Karinska, developed the “powder-puff” tutu that pressed and layered the diaphanous, cloud-like skirt of yore into a sharp vertical axis that horizontally bisected the ballerina’s body, accentuating her torso and exposing the entire length of her legs to full view. The precise movements of the limbs could now be admired by the audience and policed by the imperious ballet genius: regimentation as exaltation. It fell to Sandra Jennings to teach the company this half-hour tour de force and monument of the repertoire. The brilliant revival renounced every trace of ironic distance, even when a crisp chorus line of Balanchine ballerinas bobbed on pointe to Bizet’s coyly retrospective capers.

A foil to such imposing yet appealing formalism came after the intermission in Christian Spuck’s confrontation with American composer John Adams’s orchestral work Fearful Symmetries of 1988. That title had been adopted for the evening’s entire program, but it also spoke to the daunting prospect facing any contemporary choreographer brave or foolish enough to go head-to-head with the great Balanchine.

In contrast to the starched white women’s costumes of Symphony in C, the dancers of Fearful Symmetries wore purples, browns, grays, dark greens and darker reds. These hip-hop hues and the dancers who donned them alternated with a Queen and three courtiers (Jester, Lover, Alchemist) in black. The contemporary was in ever-shifting conversation and sometimes conflict with this quartet, conjured as if from the Elizabethan era. The sovereign’s Renaissance wig of pyramid curls could almost have been a reference to the powder-puff tutu or to the Euclidean angles of Balanchine’s kinetic art. The dialogue staged by Spuck between shifting groups of two and three dancers alternated with solos and still fuller formations and fluxes. The strict angularity of Balanchine’s symphonic structures was reshaped into fluid contours and connections, as Adams’s orchestra chugged along like a 1940s swing band on autopilot, occasionally relaxing into reverie before being wound up and set in motion again. The royal quartet could have represented not only the ancien régime but also the autocrat Balanchine. At the end (of the evening and, apparently, an era encapsulated in just twenty-five minutes), the queen and her entourage were banished from the stage and from history, but the up-to-date dancers kept moving even after the music had ground to a halt and the curtain fell. Maybe they’re dancing still, provocatively asymmetrical, but occasionally in line with an ever-present past.

David Yearsley is a long-time contributor to CounterPunch and the Anderson Valley Advertiser. His latest albums, “In the Cabinet of Wonders” and “Handel’s Organ Banquet” are now available from False Azure Records.



How Music Theory Shaped 19th Century Ideas About Beauty, Visual Art



Carmel Raz |





A Scottish artist and theorist argued that the same principles governing musical harmony also determine beauty in architecture, colour, geometry, and the human form, revealing how music influenced 19th-century theories of aesthetics and perception.


“All art constantly aspires towards the condition of music.” So wrote the Victorian art critic Walter Pater in 1888. Earlier in the century, Scottish artist David Ramsay Hay composed a series of fifteen books published between 1828 and 1856 that attempted to develop a theory of visual beauty from the basic elements of music theory. Anticipating Pater but also fin-de-siècle attempts to unite the arts via spiritual or synesthetic affinities, Hay’s writings mapped colors, shapes, and angles onto familiar musical constructs such as pitches, scales, and chords. While these ideas might appear highly eccentric today, understanding them offers a glimpse of the remarkable importance of music in the Victorian Zeitgeist.

Despite the unabashedly speculative nature of his theories, Hay’s claim to have understood the psychology of beauty profoundly shaped mid-nineteenth-century notions of aesthetics, an influence amplified through his professional activities as a fellow of the Royal Society of Edinburgh and as the official interior designer to Queen Victoria. His books were reissued in multiple editions and translated into both German and French. They gained traction with leading scientists of the time, including Adolf Zeising, John Addington Symonds, and Thomas Laycock. And yet, his ideas remained complex and idiosyncratic.

Hay’s approach to visual aesthetics was equally applicable to architecture, color theory, the ornamental arts, and the human face and figure. It can be understood as a psychological account of beauty, as opposed to other contemporary theories that anchored beauty in notions of the picturesque, the mimetic, or the sublime. Though analogies between music and the fine arts certainly do not originate with Hay, his application of music theory to an extensive array of visual experiences, including color, shapes, figures, and architecture, broke new ground. Rather than locating musical properties in the objects themselves, as earlier thinkers ranging from Plato to Newton had done, Hay worked in the post-Kantian tradition, regarding these features as immanent to our own minds, where they create our experience of beauty by determining the very structure of our perceptions.

Hay defined his project as the development of a science of aesthetics based upon what he called the “great harmonic law of nature which pervades and governs the universe.” He wrote that “there appears to be implanted in the human mind a governing principle of harmony of a mathematical nature, responsive to impressions made upon the organs of sense by certain combinations, motions, and affinities in the elements of matter.”

The fact that we derive pleasure from hearing certain concordant intervals that derive from what is known as the overtone series, for Hay, demonstrates that nature and humanity are governed by the same principles. He takes this further: the physiological affinity between seeing and hearing means that these laws extend not only into music but into the visual world too. After all, he observes, “the eye and the ear are various in their modes of receiving impressions; yet the sensorium is but one, and the mind by which these impressions are perceived and appreciated is also characterised by unity.” Since both sight and hearing are processed by the mind, they should be governed by similar principles.

Throughout his writings, Hay consistently links the claim that a single fundamental law of nature determines aesthetic perception to the work of the philosopher and mathematician Pythagoras. “From the teachings of this great philosopher and his disciples,” Hay writes, “the harmonic law of nature, in which the fundamental principles of beauty are embodied, became so generally understood and universally applied in practice throughout all Greece, that the fragments of their works are still held to be examples of the highest artistic excellence ever attained by mankind.”

Hay ascribes the superiority of ancient Greek artists to their reliance on the Pythagorean system of harmonic numbers, regardless of whether they were designing a building or a vase. And since, Hay argues, the Greeks’ artistic brilliance was the fruit of a psychological phenomenon, it should be possible to combine Pythagorean tenets with an empirical investigation of beauty. Or so he fervently believed.

Hay’s work contains relatively naïve comparisons of various musical concepts (such as scale degrees, chord inversion, and melody) to diverse visual forms (such as geometrical shapes, angles, and color combinations). For example, in The Natural Principles and Analogy of the Harmony of Form (1842), he constructs an analogy between the circle, triangle, and square, and the tonic, mediant, and dominant (the first, third and fifth notes of the scale, which, when played together with the upper octave of the first note, form the most basic kind of chord, the so-called triad). The three geometrical shapes, Hay argues, analogously comprise the fundamental triad of visual beauty. This is all depicted graphically in Hay’s diagram, which incorporates three smaller figures.

In the first of these, at the top of the diagram, the musical triad (with its lowest note, the tonic, C, replicating an octave higher) is matched to a compound figure comprising a number of shapes: a large circle (representing the tonic, the low C), a much smaller triangle centered within that circle (representing the chord’s next note up, the mediant, E), a still smaller square (the dominant, G), and finally, within that square, a second, much smaller circle, representing the upper-octave replication of the tonic, C. Here, the relative sizes of the shapes are determined by the relative pitch heights of the notes they represent: lower notes get larger shapes. The next two figures within the diagram show the two “inversions” of the musical triad: here, the mediant (E) and then the dominant (G) become the lowest sounding note (instead of the tonic note). The geometrical shapes that represent those notes (first a triangle for E, then a square for G) then undergo an analogous “inversion” in space, as their relative positions and sizes change to reflect the changes in the relative pitch heights of the notes.

This use of basic shapes allowed Hay to analyze complex architectural structures in a new way—by breaking them down into their simplest constituent parts. When these basic elements are superimposed onto each other, they form a harmony, and when they are arranged in a series, they form a melody. The resulting harmonies or melodies can then be evaluated according to the simplicity and regularity of their proportions: the more beautiful an object, the more harmonious it will be. To this end, Hay identifies the “most perfectly harmonious production in architecture that exists”: the Parthenon of the Athenian Acropolis. The animation below shows Hay’s diagram of the “melody” of the portico of the Parthenon, set on the hill, which Hay transcribes as the first, third, and fifth notes of a scale.

Hay’s more mature work applied music theory to angles rather than shapes, contours, or colors. In The Science of Beauty, as Developed in Nature and Applied in Art (1856), he begins with a discussion of Pythagorean numerology, which he uses to generate a series of four scales. The proportional relationships involved in these scales map onto the “just intonation” scales, from which Hay derives a categorization of various kinds of angles. These relationships, he claims, are the “simple elements of the science of that harmony which pervades the universe, and by which the various kinds of beauty aesthetically impressed upon the senses of hearing and seeing are governed.” That is to say, Hay attributes the subjective sensation of aesthetic beauty to the effect of certain simple proportions on the senses of hearing and seeing. He then aligns this with a broader notion of cosmic harmony.

This vast systemization reaches new heights when Hay revisits the Parthenon and offers a fresh analysis. Given that all the angles of this edifice can be described as divisions of a 90-degree angle (using the simple factors of 2, 3, 5, 7, and 9 that correspond to 45 degrees, 30 degrees, 18 degrees, 12.85 degrees, and 10 degrees), he maintains that the specific proportions of their angles can be compared to the proportions of the musical scale: the elementary triad of tonic (first in the scale), dominant (fifth) and mediant (third) angles, alongside the subtonic (seventh) and supertonic (second) angles. That is to say, the edifice (as a visual form) and the scale (as a musical construct) are understood as analogous assemblages of harmonious proportions.

Hay then seeks to prove his theorem through the analysis of Greek vases, column ornaments, color arrangements, and idealized faces and figures.

His central conclusion is that nine of the angles governing the portico of the Parthenon also define the angles of the ideal female figure. Tallying measurements of ancient Greek sculptures with the empirical dimensions of six female models employed by the Scottish Academy of the Arts, Hay contends that his results confirm Vitruvius’s assertions that ancient Greek architecture was modeled on the proportions of the human body. Here, the “male gaze” extends from women’s bodies to ancient buildings; both are judged by the very same criteria.

Hay’s attempt to articulate abstract properties of visual aesthetics by using the language of music is not always convincing. Even once his claims are grasped—a tall order even for those initiated into the ways and whiles of music theory—they often appear both bizarre and speculative. All the same, there is something highly appealing in his ideas, something alluring in using music theory to open up new ways of approaching visual forms. The metaphor often attributed to Schelling, that architecture is music frozen in time, can be refracted against Hay’s project: to gaze upon beauty—whether in the form of a building, a vase, a color combination, or the human physique—was, for Hay, to experience the geometrically ordered music of the spheres.

Carmel Raz is an assistant professor of music at Cornell University whose research explores the history of music, cognition, aesthetics, and theories of mind from the 17th through the 19th centuries.

This article was originally published as “Music of the Squares: David Ramsay Hay and the Reinvention of Pythagorean Aesthetics” on the Public Domain Review under a Creative Commons Attribution-ShareAlike 3.0.

Courtesy: Independent Media Institute



Saturday, November 22, 2025

SPACE/COSMOS

‘Worms in space’ experiment aims to investigate the biological effects of spaceflight



Universities of Exeter and Leicester collaborate on mission to send nematode worms to the International Space Station



University of Leicester

Petri Pod 

image: 

The Fluorescent Deep Space Petri-Pod (FDSPP).

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Credit: University of Leicester/Space Park Leicester




A crew of tiny worms will be heading on a mission to the International Space Station in 2026 that will help scientists understand how humans can travel through space safely, using a Leicester-built space pod.

A team of scientists and engineers at Space Park Leicester, the University of Leicester’s pioneering £100 million science and innovation park, have designed and built a miniature space laboratory called a Petri Pod, based around the principle of the biological culture petri dish invented in 1887 and based upon earlier development work by the University of Exeter and Leicester, that will allow scientists on Earth to study biological organisms in space.

There is a burgeoning global drive for humans to colonise space, the Moon and other planets of our Solar System, but one of the challenges is the harmful effects of extended exposure to the effects of the space environment on human physiology. This includes microgravity which can lead to bone and muscle loss, fluid shift and vision problems in humans as well as radiation induced effects genetic damage, increased cancer risk, etc.

Hence life sciences experiments that investigate these effects on biology are an essential precursor to safe human space travel. The Fluorescent Deep Space Petri-Pod (FDSPP) has been developed by the Space Park Leicester team with the scientific lead Tim Etheridge at the University of Exeter and is tailored to the unique constraints of the space-based biology research that is urgently needed.

The Petri Pod is a miniaturised hardware solution for performing remotely operated biological experimentation on multiple types of organisms, via fluorescent and white light imaging capabilities in deep space. It is a self-contained experiment within a housing measuring approximately 10x10x30cm and weighing around 3kg, containing 12 Petri-Pods for experiments, four of which can be actively imaged. Each Petri Pod maintains a trapped volume of air and a stable comfortable temperature for the organisms when the unit is exposed to the vacuum of space. The worms are provided with food and water by means of an Agar carrier and the trapped air is sufficient for the small organisms involved. A more advanced version with ‘life support’ for larger and more complex organisms or extended missions is planned for the future based around the existing system.

The flight system hardware, along with a spare, has been delivered to the USA and has successfully undergone acceptance testing during the last two weeks, prior to it being launched on a cargo flight to the International Space Station (ISS) in April 2026. Its first passengers will be C-Elegans Nematode Worms which have natural fluorescent markers in their heads. These will be installed just before launch. Initially, the experiment and worms will spend time inside the ISS before being deployed outside on an experimental platform to expose the Petri Pod to the vacuum and radiation of space along with the micro-gravity environment for at least a 15-week period. The eight non-imaged ‘Petri Pods’ will contain a variety of other biological test subjects e.g., micro-organisms, along with tests of various materials. The experiment will be returned to Earth from the ISS after exposure on a future cargo return flight.

During the experiment the health of the worms will be monitored using photographic stills and time-lapse video captured with miniature cameras and by exposure to white light, or by fluorescent stimulation using low powered lasers, under the control of onboard microcontroller units. The FDSPP will collect data on temperature and pressure inside and outside of the containment volumes (‘Petri Pods’), and characterise the background radiation by monitoring accumulated radiation dose. Data will be stored locally in the unit for download on its return to Earth and also relayed to the Earth ground station over the ISS downlink communication system. The mission is enabled by funding from the UK Space Agency and commercial launch and support by Voyager Technologies based in Houston USA.

Professor Mark Sims who acted a project manager for FDSPP at Leicester said: “The Fluorescent Deep Space Petri-Pod has been engineered using the electronic, engineering, software and science expertise of the Space Park Leicester team, based around the 65-year heritage of space experiments at Leicester. This mission to the International Space Station (ISS) will demonstrate the flight-readiness of FDSPP and we believe its success will help position the UK amongst the global leaders of life sciences research on future low Earth orbit, Lunar and Mars missions planned by Space Agencies and private companies.”

Professor Tim Etheridge, the principal investigator and science lead for the experiment from the University of Exeter said: “Performing biology research in space comes with many challenges but is vital to humans safely living in space. This hardware, made possible through strong collaboration between biologists around the world and engineers at Space Park Leicester, will offer scientists a new way to understand and prevent health changes in deep space on any launch vehicle.”

The Space Park Leicester team behind the Fluorescent Deep Space Petri-Pod (FDSPP).


The Fluorescent Deep Space Petri-Pod (FDSPP).

Credit

University of Leicester/Space Park Leicester


Scientists get a first look at the innermost region of a white dwarf system



X-ray observations reveal surprising features of the dying star’s most energetic environment



Massachusetts Institute of Technology

Polarized Dwarf 

image: 

A smaller white dwarf star (left) pulls material from a larger star into a swirling accretion disk. The pair is called an “intermediate polar,” and MIT astronomers used powerful telescopes to measure the system’s X-ray polarization for the first time, revealing key features at the center of its hottest, most extreme regions.

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Credit: Jose-Luis Olivares, MIT





Some 200 light years from Earth, the core of a dead star is circling a larger star in a macabre cosmic dance. The dead star is a type of white dwarf that exerts a powerful magnetic field as it pulls material from the larger star into a swirling, accreting disk. The spiraling pair is what’s known as an “intermediate polar” — a type of star system that gives off a complex pattern of intense radiation, including X-rays, as gas from the larger star falls onto the other one. 

Now, MIT astronomers have used an X-ray telescope in space to identify key features in the system’s innermost region — an extremely energetic environment that has been inaccessible to most telescopes until now. In an open-access study published in the Astrophysical Journal, the team reports using NASA’s Imaging X-ray Polarimetry Explorer (IXPE) to observe the intermediate polar, known as EX Hydrae. 

The team found a surprisingly high degree of X-ray polarization, which describes the direction of an X-ray wave’s electric field, as well as an unexpected direction of polarization in the X-rays coming from EX Hydrae. From these measurements, the researchers traced the X-rays back to their source in the system’s innermost region, close to the surface of the white dwarf. 

What’s more, they determined that the system’s X-rays were emitted from a column of white-hot material that the white dwarf was pulling in from its companion star. They estimate that this column is about 2,000 miles high — about half the radius of the white dwarf itself and much taller than what physicists had predicted for such a system. They also determined that the X-rays are reflected off the white dwarf’s surface before scattering into space — an effect that physicists suspected but hadn’t confirmed until now. 

The team’s results demonstrate that X-ray polarimetry can be an effective way to study extreme stellar environments such as the most energetic regions of an accreting white dwarf. 

“We showed that X-ray polarimetry can be used to make detailed measurements of the white dwarf's accretion geometry,” says Sean Gunderson, a postdoc in MIT’s Kavli Institute for Astrophysics and Space Research, who is the study’s lead author. “It opens the window into the possibility of making similar measurements of other types of accreting white dwarfs that also have never had predicted X-ray polarization signals.”

Gunderson’s MIT Kavli co-authors include graduate student Swati Ravi and research scientists Herman Marshall and David Huenemoerder, along with Dustin Swarm of the University of Iowa, Richard Ignace of East Tennessee State University, Yael Nazé of the University of Liège, and Pragati Pradhan of Embry Riddle Aeronautical University. 

A high-energy fountain

All forms of light, including X-rays, are influenced by electric and magnetic fields. Light travels in waves that wiggle, or oscillate, at right angles to the direction in which the light is traveling. External electric and magnetic fields can pull these oscillations in random directions. But when light interacts and bounces off a surface, it can become polarized, meaning that its vibrations tighten up in one direction. Polarized light, then, can be a way for scientists to trace the source of the light and discern some details about the source’s geometry. 

The IXPE space observatory is NASA’s first mission designed to study polarized X-rays that are emitted by extreme astrophysical objects. The spacecraft, which launched in 2021, orbits the Earth and records these polarized X-rays. Since launch, it has primarily focused on supernovae, black holes, and neutron stars. 

The new MIT study is the first to use IXPE to measure polarized X-rays from an intermediate polar — a smaller system compared to black holes and supernovas, that nevertheless is known to be a strong emitter of X-rays. 

“We started talking about how much polarization would be useful to get an idea of what’s happening in these types of systems, which most telescopes see as just a dot in their field of view,” Marshall says. 

An intermediate polar gets its name from the strength of the central white dwarf’s magnetic field. When this field is strong, the material from the companion star is directly pulled toward the white dwarf’s magnetic poles. When the field is very weak, the stellar material instead swirls around the dwarf in an accretion disk that eventually deposits matter directly onto the dwarf’s surface. 

In the case of an intermediate polar, physicists predict that material should fall in a complex sort of in-between pattern, forming an accretion disk that also gets pulled toward the white dwarf’s poles. The magnetic field should lift the disk of incoming material far upward, like a high-energy fountain, before the stellar debris falls toward the white dwarf’s magnetic poles, at speeds of millions of miles per hour, in what astronomers refer to as an “accretion curtain.” Physicists suspect that this falling material should run up against previously lifted material that is still falling toward the poles, creating a sort of traffic jam of gas. This pile-up of matter forms a column of colliding gas that is tens of millions of degrees Fahrenheit and should emit high-energy X-rays. 

An innermost picture

By measuring any polarized X-rays emitted by EX Hydrae, the team aimed to test the picture of intermediate polars that physicists had hypothesized. In January 2025, IXPE took a total of about 600,000 seconds, or about seven days’ worth, of X-ray measurements from the system. 

“With every X-ray that comes in from the source, you can measure the polarization direction,” Marshall explains. “You collect a lot of these, and they’re all at different angles and directions which you can average to get a preferred degree and direction of the polarization.”

Their measurements revealed an 8 percent polarization degree that was much higher than what scientists had predicted according to some theoretical models. From there, the researchers were able to confirm that the X-rays were indeed coming from the system’s column, and that this column is about 2,000 miles high. 

“If you were able to stand somewhat close to the white dwarf’s pole, you would see a column of gas stretching 2,000 miles into the sky, and then fanning outward,” Gunderson says. 

The team also measured the direction of EX Hydrae’s X-ray polarization, which they determined to be perpendicular to the white dwarf’s column of incoming gas. This was a sign that the X-rays emitted by the column were then bouncing off the white dwarf’s surface before traveling into space, and eventually into IXPE’s telescopes. 

“The thing that’s helpful about X-ray polarization is that it’s giving you a picture of the innermost, most energetic portion of this entire system,” Ravi says. “When we look through other telescopes, we don’t see any of this detail.” 

The team plans to apply X-ray polarization to study other accreting white dwarf systems, which could help scientists get a grasp on much larger cosmic phenomena. 

“There comes a point where so much material is falling onto the white dwarf from a companion star that the white dwarf can’t hold it anymore, the whole thing collapses and produces a type of supernova that’s observable throughout the universe, which can be used to figure out the size of the universe,” Marshall offers. “So understanding these white dwarf systems helps scientists understand the sources of those supernovae, and tells you about the ecology of the galaxy.”

This research was supported, in part, by NASA.

###

Written by Jennifer Chu, MIT News

Paper: “X-Ray Polarimetry of Accreting White Dwarfs: A Case Study of EX Hydrae”

https://iopscience.iop.org/article/10.3847/1538-4357/ae11b5

Comet sparks scientific fascination, online furor over ‘alien’ origins


By AFP
November 20, 2025


This NASA image shows the interstellar comet 3I/ATLAS, circled in the center, as seen by the L'LORRI black-and-white imager on NASA's Lucy spacecraft - Copyright NASA/AFP NASA

Charlotte CAUSIT

A flying piece of cosmic rock or an alien threat? Comet 3I/ATLAS is hurtling through our solar system and captivating scientists and internet users alike, even prompting Kim Kardashian to ask NASA for answers.

Questions on whether the comet could actually be an alien spacecraft are coming from sources as varied as the reality TV star, a member of US Congress and a Harvard researcher, as well as from prominent conspiracy theorists.

But that theory has been shot down by NASA, which released new images of the comet on Wednesday after the speculation gained traction online.

“It’s amazing to see how people are really engaged in the discussion,” said Thomas Puzia, an astrophysicist who led the team at the Chilean observatory that made the discovery.

But, “it’s very dangerous and to a certain degree misleading to put speculations ahead of scientific process,” he told AFP in a thinly veiled criticism of another researcher who has been insisting for weeks that the extraterrestrial spacecraft hypothesis cannot be ruled out.

“The facts, all of them without exception, point to a normal object that is coming from the interstellar space to us,” he said.

He added the comet was “very exceptional in its nature, but it’s nothing that we cannot explain with physics.”

– Seeking signs of life –

Since its detection in July, the comet has generated intense speculation — unsurprisingly so, given it is only the third interstellar object foreign to our solar system ever discovered to be passing through.

The first was the Oumuamua comet, which sparked similar ripples of excitement and debate in 2017.

Even then, Harvard Professor Avi Loeb supported the theory that Oumuamua could be a spacecraft, a controversial position he later defended in a book.

He has now accused his scientific peers of lacking open-mindedness when it comes to Comet 3I/ATLAS.

“Obviously, it could be natural,” he told AFP. “But I said: we have to consider the possibility that it’s technological because if it is then the implications for humanity will be huge.”

NASA, however, did not agree.

“We want very much to find signs of life in the universe… but 3I/ATLAS is a comet,” said Amit Kshatriya, a senior NASA official, at a press conference on Wednesday.

The debate risked overshadowing the very real wonder that 3I/ATLAS represents, according to Puzia who said it offered “an unprecedented insight into an extrasolar system, potentially billions of years older than our own solar system.”

– ‘Goosebumps’ –

If there is one thing everyone agrees on, it is that 3I/ATLAS is anything but ordinary.

The comet holds many mysteries, particularly regarding its origin and exact composition, which scientists hope to unravel through close observation in the coming weeks as it gets closer to Earth.

This small, solid body composed of rock and ice from the far reaches of space could help us better understand how “planets might form” or even “how life might form around other stars in the Milky Way Galaxy in different times of the evolutionary history of the galaxy,” according to Puzia.

NASA scientist Tom Statler described having “goosebumps” when thinking about the comet’s origins.

“We can’t say this for sure, but the likelihood is it came from a solar system older than our own solar system itself,” he said. “It’s a window into the deep past, and so deep in the past that it predates even the formation of our Earth and our Sun.”

Unlike the two interstellar objects detected previously and only briefly studied, astronomers have had months to observe 3I/ATLAS.

And they hope this is just the beginning, thanks to improving technology for observation and detection.

“We should be finding many, many more of them every year,” Darryl Seligman of Michigan State University told AFP.

Theia and Earth were neighbors



New research suggests that the body that collided with Earth 4.5 billion years ago, creating the Moon, originated in the inner Solar System.




Max Planck Institute for Solar System Research





About 4.5 billion years ago, the most momentous event in the history of our planet occurred: a huge celestial body called Theia collided with the young Earth. How the collision unfolded and what exactly happened afterwards has not been conclusively clarified. What is certain, however, is that the size, composition, and orbit of the Earth changed as a result – and that the impact marked the birth of our constant companion in space, the Moon.

What kind of body was it that so dramatically altered the course of our planet's development? How big was Theia? What was it made of? And from which part of the Solar System did it hurtle toward Earth? Finding answers to these questions is difficult. After all, Theia was completely destroyed in the collision. Nevertheless, traces of it can still be found today, for example in the composition of present-day Earth and Moon. In the current study, published on November 20, 2025, in the journal Science, researchers led by the Max Planck Institute for Solar System Research (MPS) and the University of Chicago use this information to deduce the possible “list of ingredients” of Theia – and thus its place of origin.

Quote:
The composition of a body archives its entire history of formation, including its place of origin.
Thorsten Kleine, Director at MPS and co-author of the new study

The ratios in which certain metal isotopes are present in a body are particularly revealing. Isotopes are variants of the same element that differ only in the number of neutrons in their atomic nucleus – and thus in their weight. In the early Solar System, the isotopes of a given element were probably not evenly distributed: At the outer edge of the Solar System, for example, the isotopes occurred in a slightly different ratio than near the Sun. Information about the origin of its original building blocks is thus stored in the isotopic composition of a body.

Searching for traces of Theia in Earth and Moon

In the current study, the research team determined the ratio of different iron isotopes in Earth and Moon rocks with unprecedented precision. To this end, they examined 15 terrestrial rocks and six lunar samples that astronauts from the Apollo missions brought back to Earth. The result is hardly surprising: as earlier measurements of the isotope ratios of chromium, calcium, titanium, and zirconium had already shown, Earth and Moon are indistinguishable in this respect.

However, the great similarity does not allow any direct conclusions about Theia. There are simply too many possible collision scenarios. Although most models assume that the Moon was formed almost exclusively from material from Theia, it is also possible that it consists primarily of material from the early Earth's mantle or that the rocks from Earth and Theia mixed inseparably.

Reverse engineering of a planet

In order to learn more about Theia, the researchers applied a kind of reverse engineering for planets. Based on the matching isotope ratios in today's terrestrial and lunar rocks, the team played through which compositions and sizes of Theia and which composition of the early Earth could have led to this final state.

In their investigations, the researchers looked not only at iron isotopes, but also at those of chromium, molybdenum, and zirconium. The different elements give access to different phases of planetary formation.

Long before the devastating encounter with Theia, a kind of sorting process had taken place inside the early Earth. With the formation of the iron core, some elements such as iron and molybdenum accumulated there; they were afterwards largely absent from the rocky mantle. The iron found in the Earth's mantle today can therefore only have arrived after the core was formed, for example on board of Theia. Other elements such as zirconium, which did not sink into the core, document the entire history of our planet's formation.

Meteorites as a reference

Of the mathematically possible compositions of Theia and the early Earth that result from the calculations, some can be ruled out as implausible. 

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The most convincing scenario is that most of the building blocks of Earth and Theia originated in the inner Solar System. Earth and Theia are likely to have been neighbors.
Timo Hopp, MPS scientist and lead author of the new study

While the composition of the early Earth can be represented predominantly as a mixture of known meteorite classes, this is not the case with Theia. Different meteorite classes originated in different areas of the outer Solar System. They therefore serve as reference material for the building material that was available during the formation of the early Earth and Theia. In the case of Theia, however, previously unknown material may also have been involved. Researchers believe this material’s origin to be closer to the Sun than Earth. The calculations therefore suggest that Theia originated closer to the Sun than our planet.