“Astronomers thought comet Borisov was pretty boring. They were wrong.”

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Nicely summarized via MIT Technology Review…

The interstellar comet’s pristine nature is a sign that perhaps our solar system is not so different from others in the galaxy…

https://www-technologyreview-com.cdn.ampproject.org/c/s/www.technologyreview.com/2021/03/30/1021469/interstellar-comet-2i-borisov-prestine/amp/