3, 2004, into an initial parking orbit around Earth. MESSENGER was launched at 06:15:57 UT Aug. It was the first mission to Mercury after Mariner 10, more than 30 years before. Its primary goal was to study the geology, magnetic field, and chemical composition of the planet. MESSENGER (Mercury Surface, Space Environment, Geochemistry and Ranging) was the seventh Discovery-class mission, and the first spacecraft to orbit Mercury. 30, 2015: MESSENGER plunged into Mercury at end of is mission In Depth: MESSENGER 11, 2011: MESSENGER finally entered orbit around Mercury nearly seven years after launchĪpr. Energetic Particle and Plasma Spectrometer (EPPS).Mercury Atmospheric and Surface Composition Spectrometer (MASCS).The mission ended when MESSENGER slammed into Mercury’s surface. Among its accomplishments, the mission determined Mercury’s surface composition, revealed its geological history, discovered details about its internal magnetic field, and verified its polar deposits are dominantly water-ice. NASA's MESSENGER spacecraft orbited Mercury for more than four years.
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