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Home This image from NASA’s Solar Dynamics Observatory on March 16, 2015, shows two dark spots, called coronal holes. The lower coronal hole, a polar coronal hole, was one of the biggest observed in decades. (NASA/SDO) This image from NASA’s Solar Dynamics Observatory on March 16, 2015, shows two dark spots, called coronal holes. The lower coronal hole, a polar coronal hole, was one of the biggest observed in decades. (NASA/SDO)

This image from NASA’s Solar Dynamics Observatory on March 16, 2015, shows two dark spots, called coronal holes. The lower coronal hole, a polar coronal hole, was one of the biggest observed in decades. (NASA/SDO)

This image from NASA’s Solar Dynamics Observatory on March 16, 2015, shows two dark spots, called coronal holes. The lower coronal hole, a polar coronal hole, was one of the biggest observed in decades. (NASA/SDO)

This image from NASA’s Solar Dynamics Observatory on March 16, 2015, shows two dark spots, called coronal holes. The lower coronal hole, a polar coronal hole, was one of the biggest observed in decades. (NASA/SDO)

Forced magnetic reconnection, caused by a prominence from the Sun, was seen for the first time in images from NASA’s Solar Dynamics Observatory, or SDO. This image shows the Sun on May 3, 2012, with the inset showing a close-up of the reconnection event imaged by SDO’s Atmospheric Imaging Assembly instrument, where the signature X-shape is visible. (NASA/SDO/Abhishek Srivastava/IIT(BHU))