THE TOXIC TAIL OF COMET BORISOV: For the first time, amateur astronomers are beginning to clearly see the tail of interstellar Comet Borisov, the first known active comet from another star system. New measurements of gas in the tail show that 2I/Borisov is spewing cyanide--a possible clue to the nature of the comet's faraway home. Visit Spaceweather.com for the full story.
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Above: A movie of interstellar Comet Borisov obtained by amateur astronomer Michael Jäger of Weißenkirchen, Austria, on Oct. 11, 2019.
