Live coverage: New Horizons flyby target comes into focus

Two cosmonauts and a NASA astronaut undocked from the International Space Station and plunged back to Earth early Saturday, landing on the steppe of Kazakhstan amid preparations in Florida for launch of another station-bound crew Thursday aboard a SpaceX Crew Dragon spacecraft.

NASA has narrowed its choices for a new billion-dollar robotic space mission: A plutonium-powered quadcopter to explore the hazy landscape of Saturn’s largest moon Titan, or a probe to scoop up a piece of a comet and return it to Earth.

Loaded with three commercial satellites, a European Ariane 5 rocket returned to its launch pad in French Guiana Thursday after a two-week launch delay to resolve a technical issue that forced an abort to a countdown July 31. Arianespace says the mission has been rescheduled for launch Saturday due to unfavorable upper level winds in the forecast for Friday.