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What Astronomers Thought Pluto Looked Like Before They Saw It Up Close

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It’s been 91 years since amateur astronomer Clyde Tombaugh first spotted Pluto on a set of glass negatives. Since then, the object has been declared a planet, named, and, of course, demoted to a dwarf planet in 2006. Whatever its status, our fascination with Pluto has held fast. But until very recently, we didn’t have…

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Source: gizmodo.com