03.04.08 - For reasons not fully understood, auroras are more common in the spring than at other times. The five-craft THEMIS fleet may help scientists determine why.
THEMIS has made three important discoveries about spectacular eruptions of Northern Lights called "substorms" and the source of their power.
07.16.07 - Status report on the THEMIS spacecraft as of July 16, 2007.
Learn more about the mysteries of auroras.
The THEMIS mission plans to unravel the tantalizing mystery behind auroral substorms, an avalanche of magnetic energy powered by the solar wind that intensifies the northern and southern lights.
Using data from NASA's THEMIS mission, a team of University of Alberta researchers has pinpointed the impact epicenter of an earthbound space storm as it crashes into the atmosphere.
Electrons – the particles that carry electricity – can both protect and disrupt your satellite TV or GPS navigator with a "song".
Earth's magnetic field, which shields our planet from particles streaming outward from the sun, often develops two holes that allow the largest leaks, according to researchers sponsored by NASA and the National Science Foundation.