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Mysterious Fast Object May Be Our First Visitor from Another Solar System
A/2017 U1 is most likely of interstellar origin. Approaching from above, it was closest to the Sun on Sept. 9. Traveling at 27 miles per second (44 kilometers per second), the comet is headed away from the Earth and Sun on its way out of the solar system. Image credit: NASA/JPL-Caltech › Larger view › Larger…
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Mysterious Fast Object May Be Our First Visitor from Another Solar System
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