Coronal jets are small-scale transient ejections of hot gases, or plasma, occurring in the solar atmosphere. During a typical event, about a million tons of matter are ejected at speeds reaching a million miles per hour over a few minutes' time.
Sequences of STEREO satellite images of a solar tsunami blasting across the Sun's million degree atmosphere.
Boosted to almost the speed of light, "killer electrons" can knock out computers, pierce spacesuits and damage the tissues of astronauts.
NASA's STEREO satellite captured the first images ever of a collision between a coronal mass ejection and a comet.
NASA's STEREO Mission is being presented in a new digital 3D film titled "3D Sun."
STEREO observed a nice gathering of solar prominences in profile as they twisted, stretched and floated just above the solar surface.
By combining images taken almost simultaneously from the Ahead and Behind STEREO spacecraft, researchers have generated a 3-D sequence of four images.
Listen in as members of the mission team discuss looking at solar storms in 3-D and the upcoming launch.
› Mission and Science Q&AThis interactive gallery highlights the best photos of STEREO's prelaunch processing.