Big sunspot rotates into view

A group of sunspots has emerged on the Earth-facing side of the sun, just in time for Thanksgiving. 

Researchers identified the sunspots before they were even visible from Earth, via a technique called helioseismology, which uses acoustic waves beneath the sun’s surface to probe for the features.

“We measured a change in acoustic signals on the far side of the sun,” Alexei Pevtsov, associate director for the National Solar Observatory (NSO) program that generates solar predictions, said in a statement. “We can use this technique to identify what is happening on the side of the sun that faces away from Earth, days before we can catch a glimpse from here.”



NASA's Solar Dynamics Observatory spacecraft captured this view of several large sunspots in November 2020.


© Provided by Space
NASA’s Solar Dynamics Observatory spacecraft captured this view of several large sunspots in November 2020.

The scientists predicted that the sunspots, the largest of which appears to be several times bigger than Earth, would rotate into

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