TED Talksのインスタグラム(ted) - 6月28日 04時25分

This is `Oumuamua, the first visitor EVER from another star system. Scientists had been expecting to see an interstellar comet pass through our solar system since the 1970s, but it had never happened until this guy showed up in October 2017. `Oumuamua (which is Hawaiian for “scout” or “messenger”) is a half-mile-long, and researchers like astrobiologist Karen J. Meech are still trying to figure out exactly where it came from. Is it rocky debris from a new star system? Shredded material from a supernova explosion? Or even evidence of alien technology? “I think this visitor from afar has really brought home the point that our solar system isn't isolated. We're part of a much larger environment, and in fact, we may even be surrounded by interstellar visitors and not even know it,” says Karen. To hear more about what Karen and her team have learned about `Oumuamua, visit go.ted.com/spacevisitor
Image by ESO/M. Kornmesser

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