Live coverage: Ariane 5 soars into space from Kourou

SpaceX says engineers completed checks of the Falcon Heavy rocket, its satellite payloads, and ground systems at the Kennedy Space Center after a lightning strike on the launch pad’s tower Thursday night, part of a wave of severe weather that forced officials to delay the launch attempt.

Fifteen CubeSats owned by NASA, Spire Global, and U.S. research institutions launched aboard a Northrop Grumman Cygnus cargo ship in May have been released into orbit, beginning missions to demonstrate miniaturized, low-cost Earth science instruments and join a commercial network of weather-monitoring nanosatellites.

SpaceX fired up a Falcon 9 rocket at Cape Canaveral Wednesday in a pre-flight test for a Starlink satellite launch Sunday, moving closer to the company’s final mission before sending two NASA astronauts into orbit for the first time May 27.