Tonight, a Soyuz rocket will launch from French Guiana, carrying two satellites into space. Though the Soyuz is a Russian-made rocket, this flight will be operated by European spaceflight company Arianespace, which frequently launches rockets from the Guiana Space Center. Liftoff is scheduled for 10:08PM ET — with the satellites set to deploy more than three and a half hours afterward.
The two satellites are numbers nine and ten of what will eventually be 30 satellites in three orbital planes around Earth. They’re part of Europe's Galileo constellation — the goal of which is to create a reliable global positioning system for all European nations.