On April 30, 2015, NASA's MESSENGER mission came to an end when the spacecraft intentionally crashed into the surface of Mercury. Discover More Space History 👉 https://trib.al/aJ5fWPd MESSENGER was the first spacecraft to orbit Mercury and the second spacecraft to study it up close after NASA's Mariner 10 flew by the planet in the 1970s. MESSENGER spent four years orbiting Mercury. During that time, it mapped the surface of Mercury in unprecedented detail. The mission discovered water ice and o

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