Strange ingredient in interstellar comet Borisov offers a clue to its origins
All About Space|Issue 104
Astronomers have revealed the unusual chemical composition inside 2I/ Borisov, the interstellar comet that visited our Solar System last year. A strange ingredient has provided new clues about where this travelling space rock originated from.
Chelsea Gohd

2I/Borisov was discovered on 30 August 2019 by amateur astronomer Gennady Borisov. Following the appearance of interstellar object ‘Oumuamua in 2017, this was the second object from another solar system ever discovered wandering through our cosmic neighbourhood. In December 2019 astronomers took a closer look at 2I/Borisov using the Atacama Large Millimeter/submillimeter Array (ALMA), a giant radio telescope in Chile.

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