Photos: Atlas 5 rocket aims for International Space Station

The first Ariane 5 rocket scheduled for launch in 2018 has been topped off with two communications satellites for SES and Yahsat, moving the European booster closer to liftoff Thursday from a tropical launch pad in French Guiana with payloads to serve commercial and scientific missions.

The United Launch Alliance Atlas 5 rocket, standing 194 feet tall and and weighing a million pounds, unleashes 1.6 million pounds of thrust from its main engine and two side-mounted solid boosters to launch the secret NROL-52 payload for the U.S. National Reconnaissance Office from Cape Canaveral.

The second orbital test flight of India’s GSLV Mk.3 launcher took off Wednesday, hoisting a high-throughput communications satellite into orbit to connect the county’s remote population and clearing the way for a robotic lunar lander to use the rocket in January.