Science
A cookie! First interstellar visitor is nothing like a cigar – Sydney Morning Herald
It is also not an asteroid, nor a comet. Scientists say Oumuamua is from beyond our solar system.
It was classified as a comet in 2018 but using its shininess, size and shape and that it was propelled by escaping substances that didnt produce a visible tail Jackson and Desch devised computer models that helped them determine Oumuamua was most likely a chunk of nitrogen ice being gradually eroded, the way a bar of soap shrinks with use.
Their two papers were published on Wednesday (AEDT) by the American Geophysical Union and also presented at the Lunar and Planetary Sciences Conference, typically…
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