Live coverage: Space station crew concludes 186 days in orbit

NASA ground crews at the Kennedy Space Center are continuing to stack segments of the Space Launch System’s side-mounted solid rocket boosters on a mobile launch platform inside the iconic Vehicle Assembly Building.

Northrop Grumman’s Antares rocket will deliver a Cygnus supply ship into orbit Saturday to begin a two-day pursuit of the International Space Station.

Two companies — U.S. aerospace giant Lockheed Martin and British start-up Orbex — seeking to carve out a share of the burgeoning small satellite launch market plan to fly their rockets from a remote site on the northern shore of Scotland, British government and industry officials announced Monday.