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oumuamua-is-a-mildly-active-comet-and-the-first-interstellar-object-detected-passing-through-the-solar-system-elements-of-this-image-furnished-by-nasa-stockpack-adobe-stock
Oumuamua is a mildly active comet, and the first interstellar object detected passing through the Solar System.

What Space Object ‘Oumuamua Says About How Science Works

The space object, thought by at least one famed astronomer to be an ET lightsail, prompts thoughts about how scientists decide what to believe

The subtitle of Matthew Bothwell’s wrap-up on ‘Oumuamua is most informative: An alien-made artefact or just interstellar debris? What ʻOumuamua says about how science works when data is scarce. At least one astronomer, Harvard’s Avi Loeb, insisted that ‘Oumuamua must be an “extraterrestrial light sail.” And few suggested that that couldn’t possibly be true. Right. What do we do when we are not sure? Bothwell, author of the forthcoming Invisible Universe, offers some thoughts. W all imagine ET in our own image: Victorians of the late 19th century, living in the era of ambitious engineering, looked at Mars and saw globe-spanning canals – evidence, they believed, of a grand industrial civilisation mirroring their own. In the Cold War 1960s, as…