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The First Interstellar Object From Outside the Solar System
This is the first object that was spotted close to earth from outside the solar system. At first astronomers thought it must be a piece of rock, you know, just like all the asteroids and comets that we have seen from within the solarsystem. And it just came from another star. I should say that the actual discovery of this object was surprising to me because a decade earlier, I wrote the first paper trying to predict whether the same telescope would find anything from interstellar space given what we know about our solar system. None has been.