The Gaia Satellite was launched on December 19 of last year. It’s mission: to chart a 3D map of the Milky Way Galaxy by surveying more than 1 billion stars. Even though that’s just 1 percent of the stars in the galaxy, its goal is to make the largest, most precise map of where Earth dwells by observing the position of these stars 70 times over five years. Among other things, this could result in the discovery of up to 70,000 additional alien planets.
Irene W. Pennington Planetarium 