Snapshots from Atlas 5 launch

Flying for the 155th and final time, a United Launch Alliance Delta 2 rocket took off from California on Sept. 15 with NASA’s ICESat 2 satellite.

The Falcon 9 booster for SpaceX’s next mission fired up briefly on a Cape Canaveral launch pad Sunday in a routine pre-flight test before a scheduled launch Friday night to kick off the final flight of the first version of the company’s Dragon cargo capsule to the International Space Station.

Bad weather offshore has forced SpaceX and NASA to delay Thursday’s planned launch of the Crew Dragon by a day. Better conditions are expected on Friday for a 5:49 a.m. EDT (0949 GMT) liftoff from the Kennedy Space Center.