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Illustration of NASA's Advanced Composition Explorer (ACE) spacecraft.NASA's Advanced Composition Explorer (ACE) launched in 1997.Launch of NASA's Advanced Composition Explorer (ACE) and data from the ACE instrument, the Cosmic Ray Isotope Spectrometer (CRIS).
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Illustration of NASA's Advanced Composition Explorer (ACE) spacecraft.NASA
NASA's Advanced Composition Explorer (ACE) launched in 1997.NASA
Launch of NASA's Advanced Composition Explorer (ACE) and data from the ACE instrument, the Cosmic Ray Isotope Spectrometer (CRIS).NASA
Mission logo for NASA's Advanced Composition Explorer.
Mission name: ACE

Advanced Composition Explorer

Observing solar, interplanetary, interstellar, and galactic origins.

Mission news and discoveries
Illustration of NASA's Advanced Composition Explorer (ACE) spacecraft.
Stellar Wind and Planetary HabitabilityMarch 03, 2020
Illustration of NASA's Advanced Composition Explorer (ACE) spacecraft.
Exploring Our Sun Will Help Us Understand HabitabilityFebruary 25, 2020
Illustration of NASA's Advanced Composition Explorer (ACE) spacecraft.
Shaping Habitability with Flares from the Early SunJanuary 30, 2020