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37 years later to the day, the MESSENGER spacecraft sent back the first photo of Mercury from orbit #OTD in 2011! MESSENGER gave scientists the first new data on the composition of Mercury's surface since Mariner 10's final 1975 flyby.

More about Mercury: https://go.nasa.gov/3lPVmIT
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Exploration | Mercury – NASA Solar System Exploration

NASA’s real-time science encyclopedia of deep space exploration. Our scientists and far-ranging robots explore the wild frontiers of our solar system.
NASA Solar System Exploration
#otd #NASAhistory

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