STEREO - Solar Terrestrial Relations Observatory
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Important notice about reduced STEREO science operations

About the STEREO Mission

STEREO (Solar TErrestrial RElations Observatory) is the third mission in NASA's Solar Terrestrial Probes program (STP). It employs two nearly identical space-based observatories - one ahead of Earth in its orbit, the other trailing behind - to provide the first-ever stereoscopic measurements to study the Sun and the nature of its coronal mass ejections, or CMEs.

STEREO's scientific objectives are to:

  • Understand the causes and mechanisms of coronal mass ejection (CME) initiation.
  • Characterize the propagation of CMEs through the heliosphere.
  • Discover the mechanisms and sites of energetic particle acceleration in the low corona and the interplanetary medium.
  • Improve the determination of the structure of the ambient solar wind.


Last Revised: Saturday, 09-Feb-2013 15:49:52 EST
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