A NASA spacecraft sees the sun unleash a stunning explosion.
On June 18, 2015, NASA’s Solar Dynamics Observatory, or SDO, spacecraft observed an arching eruption on the sun. The eruption ultimately escaped the sun's gravity, growing into a substantial coronal mass ejection—a giant cloud of solar material traveling through space. The spacecraft, which watches the sun constantly, captured images of the event in extreme ultraviolet wavelengths. The images allow scientists to track the movement of material released from the sun and into space where, if directed toward Earth, it can affect electronics on satellites, GPS communications or even utility grids on the ground. Watch the video to see the event unfold.