This image shows four sky maps made with the new ESA Gaia data released on June 13, 2022. All this data is helping to reveal the origin, structure, and evolutionary history of our galaxy.
On December 3, 2020, they did an early third data release with detailed data on more than 1.8 billion stars. The first data release was on September 14, 2016, followed by the second data release on April 25, 2018. Today marks the data of the third data release from Gaia. It also revealed the total weight of the Milky Way, a direct measurement of the galactic bar in the Milky Way, mysterious fossil spiral arms in the Milky Way, and a new member of the Milky Way family. Although it launched all the way back in 2013, it is still working to accurately map the the motions, luminosity, temperature and composition of the stars in our galaxy.Īlong the way it has made numerous discoveries, such as detecting a shake in the Milky Way, the observation of almost 500 explosions in galaxy cores, crystallization in white dwarfs, and discovering a billion-year-old river of stars. Gaia is a mission of the European Space Agency (ESA) to create an precise three-dimensional map of more than a billion stars throughout our Milky Way galaxy and beyond. One of the surprising discoveries coming out of Gaia data release 3, is that Gaia is able to detect starquakes – tiny motions on the surface of a star – that change the shapes of stars, something the observatory was not originally built for.
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