The ACE (Advanced Composition Explorer) experiment is a NASA space mission that was launched on August 25, 1997. The ACE spacecraft is designed to study particles of solar, interstellar, interplanetary, and galactic origins. It operates at the L1 Lagrange point, which is located about 1.5 million kilometers from Earth, allowing it to continuously observe cosmic rays and particles without the interference of the Earth's atmosphere and magnetic field.
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