![]() ![]() This survey is far more important than anything previously carried out in the field of astrometry, the branch of astronomy devoted to measuring the position and tracking the movement of stars. For some of them, it managed to identify not only its location on the celestial vault and its distance away from us but also its speed and its physical properties. In total, it comprised 1.8 billion stars and millions of other bodies. On June 13, it reached a milestone by sending the scientific community a first complete version of its catalog. This European Space Agency (ESA) satellite, launched in 2013, systematically analyzes the light from the brightest objects in the sky to produce a three-dimensional map of about 1% of the Milky Way. The third delivery of the Gaia space astrometry mission marks a new turning point in the study of the composition, formation and evolution of our galaxy. It's the tree that towers above the forest. ![]() This represents a major advance in astrometry.įrom this height, you can capture the whole landscape. Long ReadThe satellite launched in 2013 has just delivered the scientific community with a preliminary version of a three-dimensional map encompassing around 1% of the Milky Way. Gaia, the Milky Way's cartographer By Vahé Ter Minassian Published on Jat 22h00, updated at 22h00 on July 23, 2022
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