This collection of images from NASA and SpaceX photographers shows the Crew Dragon spacecraft lifting off on top of a Falcon 9 rocket May 30.

Trouble with a hydraulic pump needed to release Orbital ATK’s air-launched Pegasus XL rocket from its carrier jet Monday has delayed the deployment of eight NASA hurricane research satellites until at least Wednesday.

The launch of a Russian Progress cargo ship aboard a Soyuz rocket was aborted in the final minute of the countdown Sunday, forcing a delay of at least two days in the start of a resupply and refueling mission to the International Space Station.