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Sleepy Sun's Heart-Shaped Sunspot Erupts

A huge, heart-shaped sunspot shot off a strong solar flare Sunday evening (April 17), temporarily disrupting radio communications here on Earth.

April 20, 2016
2:40 PM EDT
The heart-shaped sunspot AR 2529 is visible in the upper right of this image captured by NASA's Solar Dynamics Observatory. AR 2529 poduced a solar flare at 8:29 p.m. EDT on April 17, 2016. | NASA/SDO