Sneak peek: this new image provides a preview of Gaia’s first full-colour all-sky map (which will be unleashed in its highest resolution with the next data release in 2018). While surveying the positions of over a billion stars, ESA’s Gaia mission is also measuring their colour, a key diagnostic to study the physical properties of stars… http://sci.esa.int/gaia/59404-sneak-peek-of-gaias-sky-in-colour/
