For over a century, the sun's surface appeared to end in a soft blur at the edges of its great convection cells — a boundary that astronomers could never quite resolve. Now, with the world's most powerful solar telescope perched atop a Hawaiian volcano, scientists have discovered that this blur was never emptiness but rather a hidden world of spinning plasma coils, each carrying its own magnetic field and growing at breathtaking speed. The finding reframes the sun not as a static furnace but as a dynamic, intricately braided engine — and may finally explain why the sun's outer atmosphere burns
Unprecedented solar telescope images reveal tiny plasma whirlpools on sun's surface
Whirlpools that grow 2.7 times larger in 18 seconds
Mark
So we're looking at the sun's surface for the first time, really?
Mimi
Not for the first time, but with genuine clarity. Astronomers have been photographing it for over a hundred years. The edges of the convection cells always looked blurred, frayed. Now we can see what's actually there.
Luke
But how much of that blur was real physics versus instrumental limitation? The source says telescopes under 2 meters can't resolve these features. That's a specific threshold.
Mimi
Exactly. The DKIST is 4 meters. That's what made the difference. And they used a camera capturing 740 frames per second to freeze the motion.
Mark
What are we actually seeing? These plasma coils—are they new structures, or were they always there?
Mimi
They were always there. The structures themselves—the coils, the whirlpools—they exist at the boundary between convection cells. But nobody could see them clearly before.
Luke
The source says the coils are 25 to 170 kilometers long. That's a wide range. Do we know why there's such variation?
Mimi
The source doesn't explain the variation. It just reports the range they observed.
Mark
And these whirlpools grow to 2.7 times their size in 18 seconds. That's fast. What does that tell us?
Mimi
It suggests they're energetically significant. They're not passive features. They're actively moving energy and magnetic fields around.
Luke
The computer simulations matched the observations. That's important—it means the physics is consistent. But the simulations also placed the vortices 100 to 400 kilometers below the photosphere. So we're not seeing them directly; we're seeing their effects.
Mimi
Right. The whirlpools themselves are subsurface, but their signature is visible at the surface.
Mark
Why does this matter for understanding the sun?
Mimi
The sun's outer atmosphere is hotter than its surface, which shouldn't happen according to simple physics. These whirlpools might be part of the answer—they could be braiding magnetic field lines in a way that releases energy upward.
Luke
That's still a hypothesis, though. The source says the next step is to determine how much energy these instabilities actually transport. So we don't yet know if they're the primary mechanism or one of several.
Mimi
True. But it's a new mechanism to investigate, and that's significant.
O Pulso
- A century-old question about whether the sun's granule edges were truly blurred or simply beyond instrument reach has now been answered — and the answer is neither: they were always teeming with structure too fine to see.
- The Daniel K. Inouye Solar Telescope in Hawaii captured features just 19 kilometers across, revealing plasma coils between 25 and 170 kilometers long spinning at up to 2.8 km/s and expanding to nearly three times their size in under 20 seconds.
- These plasma whirlpools form, merge, and dissolve in a continuous cycle, behaving like the turbulent interface between two fluids moving at different speeds — a phenomenon previously observed on gas giants like Jupiter, but never before on the sun.
- Computer simulations using magnetohydrodynamics confirmed the observations precisely, lending scientific weight to the idea that these vortices braid and release magnetic energy — potentially driving solar flares and heating the corona to its paradoxically extreme temperatures.
- The next phase of research aims to measure how much energy these instabilities actually transport, with implications for transforming solar weather prediction and our understanding of the sun's influence on Earth.
For over a century, the sun's surface appeared to end in a soft blur at the edges of its great convection cells — a boundary that astronomers could never quite resolve. Now, with the world's most powerful solar telescope perched atop a Hawaiian volcano, scientists have discovered that this blur was never emptiness but rather a hidden world of spinning plasma coils, each carrying its own magnetic field and growing at breathtaking speed. The finding reframes the sun not as a static furnace but as a dynamic, intricately braided engine — and may finally explain why the sun's outer atmosphere burns hotter than its own surface.
For more than a century, the edges of the sun's convection cells — the granules that tile its visible surface — appeared blurred in every photograph ever taken. Solar physicists debated for decades whether this was a real feature of the sun or simply the limit of their instruments. In August, an international team from the U.S. National Solar Observatory, Germany's Max Planck Institute, and the High Altitude Observatory published findings in Nature that settled the question: the blur was never blur at all.
Using the Daniel K. Inouye Solar Telescope in Hawaii — a 4-meter instrument near the 10,000-foot summit of Haleakalā — the researchers captured the sharpest solar images ever recorded, resolving features just 19 kilometers across. What they found at the granule edges was not smoothness but an intricate population of plasma coils, each between 25 and 170 kilometers long, each carrying its own magnetic field, and each in constant motion.
These coils generate whirlpools — vortices of plasma that spin and shift shape within seconds. A high-speed camera capable of 740 frames per second revealed that the fastest-growing vortices expanded to 2.7 times their original size in just 18 seconds, rotating at speeds between 1.6 and 2.8 kilometers per second. Over three-minute observation windows, the whirlpools continuously formed, merged, and broke apart. Magnetohydrodynamic simulations confirmed the observations with striking precision.
The implications reach well beyond novelty. These vortices appear to be engines that braid and release magnetic energy, potentially explaining both the mechanics of solar flares and one of solar physics' most enduring mysteries: why the sun's outer corona is hotter than its own surface. Researchers note that telescopes with mirrors smaller than 2 meters cannot resolve these structures at all — making DKIST's scale, combined with advanced image-processing techniques, the essential key to the discovery. The team's next step is to quantify how much energy these instabilities carry and trace how they connect to the larger, more violent events in the sun's upper atmosphere.
For more than a century, astronomers have photographed the sun's visible surface—the photosphere—and seen the same thing: a honeycomb pattern of convection cells, each spanning roughly 2,000 kilometers, the distance from Mumbai to Guwahati. The edges of these cells, called granules, always appeared blurred in every image, frayed like worn cotton. Solar physicists wondered for decades whether this blur was real or simply the limit of their instruments. Now they have their answer, and it has opened an entirely new window into how the sun works.
In August, a team of researchers from the U.S. National Science Foundation's National Solar Observatory, Germany's Max Planck Institute for Solar System Research, and the High Altitude Observatory published findings in Nature that settle the question decisively. Using the Daniel K. Inouye Solar Telescope in Hawaii—a facility with a 4-meter primary mirror perched near the 10,000-foot summit of Haleakalā volcano—they captured the sharpest images of the sun's surface ever recorded. The resolution was extraordinary: they could distinguish features 19 kilometers across, a precision equivalent to spotting a 10-rupee coin in Mumbai from Pune. What they found was not blur at all, but intricate detail that had been invisible until now.
The granule edges, it turned out, are not smooth. Instead, they are lined with countless small coils of plasma, each between 25 and 170 kilometers long, separated by roughly 65 kilometers, each with its own magnetic field. More remarkably, these coils are not stationary. They move along the boundaries of the granules, twisting and interacting with one another. As they do, they generate whirlpools—vortices of plasma that spin rapidly and shift shape within seconds. The phenomenon is analogous to what happens when wind blows across a river: where two adjacent fluids move at different speeds, small whirlpools form at the interface. Scientists had observed similar vortices in the atmospheres of gas giants like Jupiter, but this is the first time they have been seen on the sun's surface.
The speed at which these whirlpools grow is striking. Using a high-speed FastCam camera developed jointly by the National Solar Observatory and Max Planck Institute—capable of capturing 740 frames per second with an exposure time of 100 microseconds—the researchers found that the fastest-growing vortices expanded to 2.7 times their original size in just 18 seconds. Even slower-growing ones reached that size in 71 seconds. They rotated at speeds between 1.6 and 2.8 kilometers per second. Over the course of three minutes, the whirlpools continuously formed, merged with one another, and broke apart again. The team confirmed these observations using computer simulations based on magnetohydrodynamics, and the results matched: the vortices' rotational speed and energy were identical in both the telescope observations and the models.
The significance of this discovery extends beyond the novelty of seeing something previously invisible. These whirlpools appear to be a mechanism by which the sun transports energy and magnetic flux through its atmosphere. The braiding and distortion of magnetic field lines by these small-scale vortices could explain how magnetic energy is stored and then released in solar flares and other eruptions. This may also shed light on one of solar physics' enduring puzzles: why the sun's outer atmosphere, the corona, is unexpectedly hot—hotter, in fact, than the photosphere itself. The whirlpools, in effect, are engines that capture the sun's internal magnetic energy and radiate it outward into space.
The research team, led by scientists from institutions across the United States and Germany, notes that telescopes with primary mirrors smaller than 2 meters cannot resolve these fundamental perturbations on the sun's surface. The DKIST's 4-meter mirror, combined with advanced image processing technology called multi-frame blind deconvolution—used by team member Michiel van Noort to remove atmospheric blur from the raw images—made the discovery possible. The next phase of investigation will focus on quantifying how much energy these instabilities transport and tracing how the small vortices connect to the larger, more energetic events in the sun's upper atmosphere. Understanding these connections could transform how scientists predict solar weather and its effects on Earth.
Citações Notáveis
The weakness is in the telescope's aperture—telescopes with primary mirrors smaller than 2 meters cannot resolve the fundamental perturbations on the sun's surface— Research team from NSF National Solar Observatory, Max Planck Institute, and High Altitude Observatory
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