Europe's Gaia Billion-Object Astronomy Mission Primed for Thursday Launch

Artist’s concept of the Gaia mission. Image Credit: ESA

After many delays, the European Space Agency (ESA) is ready to launch its ambitious Gaia mission to observe and catalog around 1 billion astronomical objects—or approximately 1 percent of the entire population of our Milky Way Galaxy—on Thursday, 19 December. Liftoff of the $1.2 billion […]