Solar telescope's images reveal the sun's surface like never before

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New images of the sun's surface captured by a powerful ground-based solar telescope have revealed sunspots and other features in unprecedented detail.

Although the sun is becoming increasingly active as the July 2025 solar maximum — the peak of the sun's 11-year cycle — draws closer, the photos showcase the quieter aspects of the solar surface.

Fine, detailed structures, including glowing dots that exist where the magnetic field is the strongest, can be seen in the dark sunspots. Bright strands derived from the magnetic field called penumbral filaments, which transport heat, surround the sunspot. The Inouye Solar Telescope also glimpsed "light bridges," bright solar features that span the darkest region of a sunspot. These complex structures can differ in appearance, but scientists think light bridges could signal that a sunspot is about to decay. Future observations could provide more data about the formation of light bridges and their significance.

 

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