The folks tracking asteroids and comets that pass by Earth think a fast-moving object that sped its way between our planet and the sun came from outside our solar system.
The object, designated A/2017 U1, was about ¼ mile in diameter, and initially passed through the planetary plane between Mercury and the sun then swung down below the plane and headed out into space.
The speed of the object, though is what made people think this is the first tracked object to come from interstellar space, moving fast enough so it wouldn’t be captured by the sun’s gravitational pull.
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