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Voyager 1 becomes the first spacecraft to reach interstellar space.
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The first commercial resupply mission launches to the International Space Station.
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Orion capsule completes its first spaceflight test.
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New Horizons flies by Pluto, sending back the first close up views of the dwarf planet. https://www.nasa.gov/specials/timeline/
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Juno reaches orbit around Jupiter.
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A solar eclipse visible across the United States becomes the biggest online event in NASA's history. More than 50 million viewers watched the eclipse via web streams of NASA Television, and NASA’s website received one fifth of its traffic for the year in one day.
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Oumuamua, first known interstellarr object, makes closest approach to Earth.
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NASA confirms recovery of Antarctic ozone hole due to Montreal Protocol. https://www.nasa.gov/centers/stennis/about/history/chronology/chronology.html
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NASA announces that the first man/woman lands on Mars.
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NASA starts to build on Mars, to experiment possible human living.