Source: wikibot/advanced-composition-explorer
= Advanced Composition Explorer
{wiki=Advanced_Composition_Explorer}
The Advanced Composition Explorer (ACE) is a NASA spacecraft launched on August 25, 1997, with the primary mission of studying particles of solar, interstellar, interplanetary, and cosmic origins. ACE operates in a highly elliptical orbit around the Earth, allowing it to continuously measure the composition of various particles in different regions of the solar system.