LU STOUT: All right, welcome back. The DR2, the biggest ever 3D map of our galaxy, the Milky Way, has been released. The Gaia space telescope scanned a whopping 1.7 billion stars to make this map happen. Star gazers can thank the European Space Agency for getting it all off the ground. Researchers say that Gaia is tracing how stars move. And that's a big plus for something called galactic archaeology. Astronomers say it means that they will be able to wind the clock background and say how the galaxy evolved over the past 13 billion years. And that, my friends, is "News Stream." I'm Kristie Lu Stout. Don't go anywhere. "World Sport" with Amanda Davis is next.
Biggest Ever 3D Map Of Milky Way Galaxy Unveiled.