Video: Next International Space Station crew in Star City

NASA astronaut Kate Rubins and Soichi Noguchi, a Japanese astronaut who last walked in space more than 15 years ago, ventured outside the International Space Station Friday and completed assembly of two solar array support fixtures, part of a $100 million power system upgrade.

SpaceX is on schedule to fly two NASA astronauts on a test flight to the International Space Station by the end of 2017, but there is a lot of work to do to ensure the company’s new Crew Dragon spaceship is up to the task and ready in time, a SpaceX manager said Tuesday.

Expedition 45 commander Scott Kelly and flight engineer Kjell Lindgren have switched their spacesuits to battery power to begin planned six-and-a-half-hour spacewalk Wednesday outside the International Space Station.