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STEREO

STEREO is NASA's paired-spacecraft solar mission, using separated heliocentric viewpoints to reveal the three-dimensional structure and propagation of coronal mass ejections and to improve understanding of the solar wind.

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Identity

Aliases
Solar TErrestrial RElations ObservatorySTEREO missionSTEREO A/B
Name
STEREO
Status
active

Details

Astronauts
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Description
STEREO is NASA's paired-spacecraft solar mission, using separated heliocentric viewpoints to reveal the three-dimensional structure and propagation of coronal mass ejections and to improve understanding of the solar wind.
Destination
Heliocentric orbits with STEREO-A leading and STEREO-B trailing Earth to obtain stereoscopic 3D observations of coronal mass ejections, solar wind, and space weather; STEREO-A remains active after STEREO-B ended in 2018
Launch Site
Outcome
STEREO-A continues solar and space-weather observations after STEREO-B was decommissioned in 2018; together the twin spacecraft produced the first stereoscopic views of solar eruptions.
Programs
Start Date
2006-10-26
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Creation Time
August 1, 2026 at 07:40:06 UTC
Updated Time
August 23, 2026 at 01:57:00 UTC

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