Astronomers have released a map of the Milky Way that is "20 times more complete" than ever before, The Guardian reported Wednesday. Using observations from the European Space Agency's Gaia probe, astronomers charted 1 billion stars — still just roughly 1 percent of the galaxy — with new levels of preciseness, resulting in a map that's expected to be used by all future missions. In making the map, astronomers also realized they may have underestimated the number of stars in the Milky Way: They initially predicted the Gaia probe would spot 1 billion stars by the end of next year, but now expect to see as many as 2.5 billion stars.

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