Explore views of active regions on the sun taken by NASA’s Solar Dynamics Observatory.
Not a day goes by that our sun isn't doing something fascinating. That's why in February 2010, NASA launched the Solar Dynamics Observatory with the sole purpose of spying on our massive star. Instruments aboard the spacecraft track active regions—magnetically complex and intense areas the size of planets—as they travel through the sun's atmosphere. These dynamic regions are sources of solar flares and coronal mass ejections, powerful explosions that can affect spacecraft and disrupt power grids and communications here on Earth. By observing such features, scientists can better predict solar activity. Watch the video to see a time-lapse of two active regions on the sun.