Scientists have been trying to solve this mystery for decades. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Some coronal loops that appear to ...

Coronal loops, well-defined hot strands of plasma that arch out into the sun’s atmosphere, are iconic to the sun’s imagery. But many of the supposed coronal loops we see might not be there at all.

The Sun’s outer atmosphere, or corona, has posed an enduring mystery. Why is it so hot? The Sun’s visible surface is only 10,000° Fahrenheit (5500° Celsius), but as you move outward, the temperature ...

(Nanowerk News) Many coronal loops — ropey strands of plasma that scientists have long thought existed in the Sun’s atmosphere — may actually be optical illusions, according to a new paper that ...

NASA’s Solar Dynamics Observatory captured this image of coronal loops above an active region on the sun in mid-January 2012. The image was taken in the 171 angstrom wavelength of extreme ultraviolet ...

Some of the most spectacular features on the Sun are its coronal loops — incandescent structures of hot plasma that arc for thousands of miles above magnetically active regions of the Sun, forming ...