Live coverage: Space station crew concludes 186 days in orbit

Russia’s Progress MS-03 cargo crafted rode a Soyuz rocket into orbit Saturday from the Baikonur Cosmodrome, beginning a two-day pursuit of the International Space Station.

Arianespace has split its third order of Vega rockets from Italy’s Avio between old and new versions of the solid-fueled booster, as officials prepare to build a final batch of around 18 Ariane 5 rockets before switching to the next-generation Ariane 6 in the early 2020s.

Space station commander Peggy Whitson and astronaut Jack Fischer are set for a two-and-a-half hour spacewalk Tuesday, a quickly-planned excursion to replace a recently installed external computer that failed Saturday.