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Yohkoh

Yohkoh was a completed Japanese-led solar-observatory mission carried out with United States and United Kingdom collaborators. It observed solar flares and the physical processes of the corona from low Earth orbit until operations ended in April 2004.

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Identity

Aliases
Solar-ASOLAR-A missionYohkoh mission
Name
Yohkoh
Status
completed

Details

Astronauts
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Description
Yohkoh was a completed Japanese-led solar-observatory mission carried out with United States and United Kingdom collaborators. It observed solar flares and the physical processes of the corona from low Earth orbit until operations ended in April 2004.
Destination
Sun
End Date
2004-04-23
Launch Site
Outcome
Yohkoh returned more than a decade of X-ray and gamma-ray observations that transformed understanding of the dynamic solar corona and magnetic reconnection in flares.
Start Date
1991-08-30
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Creation Time
August 1, 2026 at 00:02:31 UTC
Updated Time
August 1, 2026 at 00:02:31 UTC

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