Two NASA astronauts and an Italian flight engineer took shelter in the space station’s Russian segment Wednesday as mission control analyzed a possible leak of toxic ammonia coolant aboard the complex. Initial data indicated it was likely a false alarm.

SpaceX technicians at Cape Canaveral are readying for the first launch of an upgraded Falcon 9 rocket configuration next week, a mission that will debut changes to make the launcher safer for astronauts and make it easier — and less expensive — for the company to reuse first stage boosters.

Another batch of Starlink Internet satellites shared a ride into orbit with three of Planet’s SkySat Earth-imaging satellites on a SpaceX Falcon 9 rocket Saturday. The Falcon 9 lifted off at 5:21 a.m. EDT (0921 GMT) from pad 40 at Cape Canaveral Air Force Station.