Watch Falcon 9 rocket lifted upright

Two astronauts ventured outside the International Space Station Friday for the first of four spacewalks to repair a $2 billion cosmic ray detector, breezing through work to prep the device for invasive surgery to splice in new coolant pumps and extend the instrument’s life probing the composition of the universe.

The oldest Falcon 9 booster in SpaceX’s operational rocket fleet sent 60 more Starlink internet satellites into space Tuesday with a launch from historic pad 39A at NASA’s Kennedy Space Center in Florida.

Watch the first spacecraft in a new generation of Russian Progress cargo vehicles arrive at the International Space Station on December 23, 2015, bringing a holiday delivery of more than 5,000 pounds of fuel, water and supplies for the research lab’s six-person crew.