Weak solar cycle? Not this week!

StephensAstro —  May 7, 2015 — Leave a comment
Photo: Earth's Sun on May 7, 2015. Photo by James Guilford.

Earth’s Sun – May 7, 2015 @ 12:23 PM EDT

Our Sun is just past the peak of its 11-year activity cycle but has been unusually quiet of late. Many days we have seen few, if any, sunspots marking the star’s face. Over the past few days, however, there has been an uptick in activity including the passage of large sunspot region AR2339 (lower-right in our photo). The sunspot has been the source of major solar flares including one that interfered with radio communications in the Pacific region. This image is a single exposure made using a digital SLR camera held to the eyepiece of the Cooley Telescope at Stephens Memorial Observatory. A white-light filter was used for the protection of equipment and vision. A good article on the current solar cycle can be found here.

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Director - Stephens Memorial Observatory

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