Gizmodo

Our Second Interstellar Visitor Was a ‘Dirty Snowball’ With Stories to Tell

New research suggests 2I/Borisov—the second known interstellar visitor to our solar system—had never previously visited a star, not even the one from its home system, prior to zipping past our Sun in 2019. That makes Borisov one of the most pristine—if not the most pristine—comet ever observed by astronomers, in...

New research suggests 2I/Borisov—the second known interstellar visitor to our solar system—had never previously visited a star, not even the one from its home system, prior to zipping past our Sun in 2019. That makes Borisov one of the most pristine—if not the most pristine—comet ever observed by astronomers, in what…

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