ESO’s VST helps determine the spacecraft’s orbit to enable the most accurate map ever of more than a billion stars — ScienceDaily

Gaia, operated by the European Space Agency (ESA, surveys the sky from orbit to create the largest, most precise, three-dimensional map of our Galaxy. One year ago, the Gaia mission produced its much-awaited second data release, which included high-precision measurements — positions, distance and proper motions — of more than one billion stars in our…