NASA's sun-watching IRIS observatory captured a recent solar eruption on video, say astronomers.
An X4.9-class solar flare that erupted Monday is so far the strongest this year. The bright flash of light was seen from the Earth, but the material ejected from the sun will most likely not reach our planet.
The IRIS solar observatory, launched last month, has sent back new pictures that show a key part of the sun's atmosphere in unprecedented detail. Some of the data are surprising.