Time History of Events and Macroscale Interactions during Substorms (THEMIS) is a two-year mission consisting of five identical probes and a network of ground observatories that will track and determine the cause of the violent eruptions of auroras that occur during substorms. When the five identical probes align over the observatories on the North American continent, scientists will collect coordinated measurements along the sun-Earth line, allowing the first comprehensive look at the onset of substorms and how they trigger auroral eruptions. Credit: NASA
The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not necessarily in the public domain.
The SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use. [2]
'''THEMIS Launch and Deploy''' 01.09.07 Time History of Events and Macroscale Interactions during Substorms (THEMIS) is a two-year mission consisting of five identical probes and a network of ground observatories that will track and determine the cause
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