Photos: Radarsat satellites encapsulated in Falcon 9 payload fairing

A SpaceX Falcon 9 rocket, powered by a previously-flown booster, lifts off from launch pad 39A at NASA’s Kennedy Space Center in Florida at 6:27 p.m. EDT (2227 GMT) on March 30, 2017, carrying the SES 10 communications satellite. The launch marked the first time SpaceX has reused the first stage of one of its Falcon 9 rockets.

After unusual concentrations of hydrogen around the rocket foiled a launch attempt Dec. 19, United Launch Alliance said Friday that the company’s powerful Delta 4-Heavy launcher and a U.S. government spy satellite will remain grounded in California until at least Jan. 6 as engineers troubleshoot a small fuel leak.

The Chinasat 9A communications satellite has arrived at its operational perch more than 22,000 miles over the equator after a Long March rocket deployed the craft in a lower-than-planned orbit last month due to a roll control error in the launcher’s third stage, according to China’s top state-owned aerospace contractor.