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aug 25, 1997 - Advanced Composition Explorer (ACE)

Description:

Observes particles of solar, interplanetary, interstellar, and galactic origins. This covers topics such as energy range, solar wind, and galactic cosmic ray nuclei. This is still in use today.

Added to timeline:

History of Space Exploration

ByBrianne Karrmann
7 Jan 2020
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280

Date:

aug 25, 1997
Now
~ 28 years ago
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