Relativity Space, a small launch startup aiming to fly its orbital rocket from Cape Canaveral for the first time next year, announced Wednesday it has signed a contract with Iridium for up to six launches of the company’s spare communications satellites. Relativity also announced it plans to develop a second launch pad at Vandenberg Air Force Base in California to allow for missions to polar orbits.

The towering structure to be used for liftoffs of NASA’s Space Launch System rolled from a construction site to launch pad 39B at the Kennedy Space Center in Florida this week, arriving at the seaside complex Friday for a week of fit checks.

New videos released Wednesday by SpaceX show the payload fairing from the company’s Falcon Heavy rocket plunging back into the atmosphere after launch June 25, trailing a wake of haunting blue super-heated plasma before unfurling a parafoil and landing in the net of an offshore recovery ship.