Pinpointing Gaia to map the Milky Way

This image, a composite of several observations captured by ESO's VLT Survey Telescope (VST), shows the ESA spacecraft Gaia as a faint trail of dots across the lower half of the star-filled field of view. These observations were taken as part of an ongoing collaborative effort to measure Gaia's orbit and improve the accuracy of its unprecedented star map.

from Latest Science News -- ScienceDaily http://bit.ly/2J62Z8m