Astronomy Magazine

Coldest Star

Posted on the 29 March 2011 by Gabe12logan
Astronomers have found the coolest star. Its surface temperature is 97 degrees Celsius, and is 75 light years away from the Earth. Such cold stars are called brown dwarfs or failed stars. They have chemical properties of stars, but their mass is not large enough to produce the pressure needed to create nuclear fusion in its interior. Coolest star is officially named CFBDSIR 1458 10b.
Newly discovered star is paired with another brown dwarf, and was  discovered by the telescope Canada-France-Hawaii at the top of Mauna Kea mountain in Hawaii. In recent years scientists have searched the universe in search of brown dwarfs trying to define the boundary between what is called a planet and what we call a star. CFBDSIR 1458 10b falls into a gray zone because its surface temperature is 97 degrees Celsius and is on the verge of something that could have an atmosphere with water clouds. Until the discovery of CFBDSIR 1458 10b coldest known brown dwarf had a surface temperature of 270 degrees Celsius.
Coldest Star
CFBDSIR 1458 10b could soon fall into the background because NASA scientists working with the Spitzer Space Telescope just trying to confirm their discovery of brown dwarf which could have a temperature of 30 degrees Celsius.

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