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A mysterious object has been spotted zooming through space at about 1.6 million km/h (1 million miles per hour), so fast that it could exit the Milky Way entirely – and scientists are trying to work out what it is. The object, known as CWISEJ1249, is about 30,000 times more massive than Earth and 8% of the sun’s mass. BBC Science Focus has more: https://flip.it/W3840L
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