Live coverage: Ariane 5 blasts off with two Intelsat satellites

Russian officials could complete their investigation of a rocket failure Tuesday by mid-December, and multiple Russian news reports suggest the probe has narrowed to focus on the guidance computer on the Soyuz launcher’s Fregat upper stage.

SES, the international communications satellite operator, plans to send two more C-band television broadcasting spacecraft into orbit from Cape Canaveral Friday night atop a SpaceX Falcon 9 rocket on a mission that will help clear spectrum for transition to 5G network services.

A troublesome liquid oxygen valve on the Space Launch System’s first flight-rated core stage will keep NASA from performing a second test-firing of the rocket’s four main engines this week.