Unprecedented glimpse of the solar surface
The Daniel K. Inouye Solar Telescope in Hawaii has delivered the sharpest-ever images of the sun's photosphere, the bright outer shell that we see. During a test run to fine-tune the instrument, researchers inadvertently captured a view so detailed that it revealed feathery, wave-like structures rippling across the surface.
Solar physicist Ruizhu Chen of Stanford University compared the patterns to the swirling skies in Van Gogh's Starry Night. The undulating features are caused by bits of magnetised plasma moving past each other at different speeds — the same fluid instability that creates waves when wind blows over water. While this phenomenon has been observed on Earth and on planets like Jupiter and Saturn, it had never been glimpsed at such resolution on the sun.
The findings, published Wednesday in the journal Nature, mark a milestone for the telescope, which is operated by the National Science Foundation. The team, including co-author Friedrich Woger of the National Solar Observatory, sees the images as a stress test that the instrument passed spectacularly.
What the swirling patterns tell solar physicists
A new window into the sun's magnetic engine
These images are more than just aesthetic marvels; they give researchers a direct look at the small-scale motions of plasma that are thought to feed the sun's complex magnetic field. Understanding this fine-scale activity could improve models of how energy builds up and is released in the solar atmosphere.
Why space weather forecasters are watching
Better knowledge of the sun's near-surface behaviour feeds directly into predicting coronal mass ejections — massive eruptions that, when directed at Earth, can disrupt GPS signals, radio communications, and even power grids. The ability to see magnetised plasma flows this clearly moves scientists a step closer to forecasting such events with greater accuracy and lead time.
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