Interstellar visitor ‘Oumuamua wasn’t a nitrogen iceberg, Harvard astrophysicists say – Space.com

The first-known interstellar object in our solar system, known as ‘Oumuamua, continues to defy scientific explanation. Now, one of the latest explanations for what the cigar-shaped interloper is made of — a “nitrogen iceberg” — has also been shot down. 
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