Q&A with Curt Blake, president of Spaceflight Industries (members only)

After an exhaustive investigation, SpaceX engineers have identified the most likely cause of the spectacular explosion of a Falcon 9 rocket during a pre-launch test Sept. 1 that destroyed the booster and its $195 million satellite payload, the company announced Monday.

SpaceX scrubbed the first test launch of its huge new rocket Monday due to a frozen valve in the pressurization system on the 33-engine Super Heavy booster, delaying the widely-anticipated flight from South Texas until at least Thursday.

A SpaceX Falcon 9 rocket lifted off from Cape Canaveral at 1:50 a.m. EDT (0550 GMT) Sunday with the Telstar 19 VANTAGE communications satellite, a powerhouse spacecraft designed to beam broadband and in-flight WiFi signals across the Americas and the North Atlantic. The rocket’s first stage successfully landed at sea aboard SpaceX’s drone ship.