First interstellar visitor 'Oumuamua' probably isn't an alien spacecraft, scientists conclude
'Oumuamua—the mystery visitor from interstellar space—is unlikely to be a spacecraft from some extraterrestrial civilization, a team of scientists has said.
This mystery visitor quickly grabbed headlines when researchers like Harvard's Avi Loeb suggested it could be an alien spaceship.. It is cigar-shaped, measuring about 650 feet in length and 114 feet wide, and rotates once every seven hours. It was also found to be accelerating instead of slowing down—a discovery that was difficult to explain. This prompted Loeb and colleagues to say the object—a craft that uses radiation pressure from the Sun to push itself forward.
The team addresses the possibility that 'Oumuamua is a form of alien technology, saying that while the idea of a solar sail could explain"some aspects of the observations," it is not enough to address others. They said the argument that 'Oumuamua was sent towards Earth on purpose based on its"unusual kinematics" was"baseless," while the solar sail hypothesis does not work because of the dimensions.
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