70,000 years ago, a nomadic star came within a light-year of the Sun, sending dozens of objects tumbling out of the solar system, new study suggests. By analyzing the orbits of 339 known comets and asteroids, astronomers also found eight objects that likely came from outside our solar system.

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70,000 years ago, a nomadic star came within a light-year of the Sun, sending dozens of objects tumbling out of the solar system, new study suggests. By analyzing the orbits of 339 known comets and asteroids, astronomers also found eight objects that likely came from outside our solar system.