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Space probe Gaia launched to map a billion stars

Last Updated: Wednesday, November 27, 2013, 13:37

Europe`s billion-star surveyor has been launched into space where it will create a highly accurate 3D map of our galaxy.

ESA`s new mission to reveal secrets of ultra-cool dwarfs

Last Updated: Thursday, February 14, 2013, 10:40

Ultra-cool dwarfs - defined as stars with a temperature below 2500 K - are the most ancient objects in our galaxy.