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MercuryReinforced Library Binding978-0-531-13311-8Mercury is the closest planet to the Sun! It may be small, but it is full of extremes. Temperatures range between -300 and 800 degrees Fahrenheit! As it zooms around the Sun every 88 days, the speedy planet is hard to spot. This informative title sho Learn MoreSpecial Price $19.50 Regular Price $26.00