A sudden intense brightening from a small area of the Sun's surface is called a _________.
Solar flare.
Detailed Explanation
Solar flares usually occur in the vicinity of a magnetic inversion near a group of sunspots. The flare develops in a few minutes, or even seconds, and may last several hours. Sunspots are temporary dark spots that sometimes appear on the surface of the Sun. Prominences are huge loops of gas that erupt from sunspot regions. Quasars are the very bright centers of distant galaxies.
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