By the numbers Dwarf planet

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01/05/05: Date Eris, the largest known dwarf planet in our solar system, was discovered

2,400: Eris’ diameter in kilometers

48: Diameter in inches of telescope used to find it

560: Years it takes Eris to orbit the sun

Minus 405: Estimated surface temperature on Eris in degrees Fahrenheit

Sources: www.gps.caltech.edu; www.wikpedia.org

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