Video: Liftoff of Atlas 5 with X-37B on program’s fourth flight

Two astronauts floated outside the International Space Station Sunday for the first in a series of spacewalks to upgrade the lab’s aging solar power system, assembling a support fixture that eventually will hold a new solar blanket.

A Russian-built Soyuz rocket launched Tuesday from the Guiana Space Center on the northeastern coast of South America, boosting Europe’s MetOp-C satellite into orbit to benefit weather forecasters worldwide and closing out a generation of weather-observing technology.

Ten small high-resolution observation satellites for Satellogic — an Argentine company in the midst of deploying a fleet of Earth-imaging spacecraft — successfully launched Friday on a Chinese Long March 6 rocket.