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NASA

NASA Discovers 7th Closest Star 137

Thorfinn.au says "Scientists using data from NASA's Wide-field Infrared Survey Explorer (WISE) have discovered the coldest class of star-like bodies, with temperatures as cool as the human body. Astronomers hunted these dark orbs, termed Y dwarfs, for more than a decade without success. When viewed with a visible-light telescope, they are nearly impossible to see. WISE's infrared vision allowed the telescope to finally spot the faint glow of six Y dwarfs relatively close to our sun, within a distance of about 40 light-years. 'WISE scanned the entire sky for these and other objects, and was able to spot their feeble light with its highly sensitive infrared vision,' said Jon Morse, Astrophysics Division director at NASA Headquarters in Washington. 'They are 5,000 times brighter at the longer infrared wavelengths WISE observed from space than those observable from the ground.'"

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