Photos: Atlas 5 rolls out for launch

Two U.S.-built commercial communications satellites moved to their last stop on Earth on Tuesday, when an Ariane 5 rocket rolled out to a launch pad at the edge of the Amazon jungle on the eve of liftoff.

NASA has delayed the award of new contracts for cargo transportation services between Earth and the International Space Station, and eliminated an uncrewed version of Boeing’s human-rated CST-100 Starliner capsule from the competition, officials said Thursday.

America’s next Mars rover, a $2.1 billion nuclear-powered vehicle to search for evidence that life once existed there, will be launched to the Red Planet in the summer of 2020 by a powerful Atlas 5 rocket.