The European Space Agency’s Gaia satellite has been helping map the billions of stars in the Milky Way, and a group of astronomers is using the spacecraft’s stunning new star catalog to search for signs of highly advanced alien civilizations.
A team of scientists from Sweden’s Uppsala University and the University of Heidelberg in Germany combed Gaia’s first data release of a billion stars from September 2016. They then cross-referenced it with observations from the Australia-based Milky Way-watching RAVE project looking for differences in how far away the two observatories place certain stars.
Danielle Futselaar/METI International
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