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NASA

Submission + - Astronomers Find The Coldest Star Ever (ibtimes.com) 3

RedEaredSlider writes: Astronomers may have found the coldest star in the universe, a brown dwarf 75 light years from Earth.

Using NASA's Spitzer Space Telescope, Kevin Luhman and John Bochanski of Penn State University and Adam Burgasser of the University of California, San Diego, discovered what looks like a faint companion to a white dwarf star called WD 0806-661. The companion orbits at a distance of 2,500 astronomical units, or about 374 billion kilometers, far enough that light takes a full 11 days to get between them.

The scientists looked at the age of the white dwarf, and came up with a figure of about 1.5 billion years. They then estimated the mass of the companion, and used the data from Spitzer, which sees in the infrared part of the spectrum. From that, they got a temperature of about 300 degrees Kelvin, or 27 degrees C.

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