Comet dust: Planet Mercury's 'invisible paint'
Providence RI (SPX) Apr 01, 2015 - A team of scientists has a new explanation for the planet Mercury's dark, barely reflective surface. In a paper published in Nature Geoscience, the researchers suggest that a steady dusting of carbon from passing comets has slowly painted Mercury black over billions of years. Mercury's dark surface has long been a mystery to scientists. On average, Mercury is much darker than its closest a ... more
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