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Oumuamua : Interstellar Asteroid Or Alien ship?
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ʻOumuamua' is the first known interstellar object detected passing through the Solar System.
It was about 33 million km from Earth and estimated to be between 100 and 1,000 metres long, with its width and thickness both between 35 and 167 metres.
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Tour of two massive black holes.
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