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Mystical interstellar object could be “lightsail” sent from another civilization

An artist's depiction of Oumuamua, the first detected interstellar object. (M. Kornmesser / ESO) NASA has ruled that Oumuamua, the…

An artist’s depiction of Oumuamua, the first detected interstellar object. (M. Kornmesser / ESO) NASA has ruled that Oumuamua, the first interstellar object ever discovered in our system, is a “metallic or rocky object” about 400 meters long and 40 meters long, but a new study by the Harvard Smithsonian Center for Astrophysics states that …

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