More specifically, Gaia provides high-quality measurements to produce a stereoscopic and kinematic census of about 1 billion stars in our galaxy (about 1% of the total) and the Local Group, the group of galaxies that includes the Milky Way. Gaia is a European space observatory whose goal is to chart a three-dimensional map of the Milky Way galaxy in order to reveal the composition, formation and evolution of the galaxy. Credits: ESA/Gaia/DPAC Map: CC BY-SA 3.0 IGO The map shows the total brightness and color of stars observed by the ESA satellite in each portion of the sky between July 2014 and May 2016. Gaia's all-sky view of our Milky Way Galaxy and neighboring galaxies, based on measurements of nearly 1.7 billion stars. Sep 14, 2016: ESA released its first dataset from GaiaĪpr 25, 2018: ESA released a second dataset from Gaia Gaia is attempting to create the largest, most-precise 3-D map of our galaxy, the Milky Way.Each of the 1 billion stars that Gaia studies will be observed an average of 70 times over five years to create a record of the brightness and the position of each star over time.
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