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A strange relic? Perhaps

A mysterious cigar-shaped object that astronomers discovered in the solar system last year could be an artifact of an alien…

A mysterious cigar-shaped object that astronomers discovered in the solar system last year could be an artifact of an alien civilization sent to explore the planet’s neighborhood, which two Harvard astronomers have postulated. The researchers said that the non-gravitational acceleration shown by the object called Oumuamua can be explained by the effect of solar radiation …

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