Amazon is turning a corner with its launch providers, but ULA’s Vulcan remains grounded. The first stage booster for Blue Origin's New Glenn rocket awaiting rollout to the launch pad. The upcoming flight will use a new booster, and Blue Origin plans to recover it on an offshore landing platform. Credit: Blue Origin It was less than two months ago that the third flight of Blue Origin’s heavy-lift New Glenn rocket left a customer’s payload in an unusable orbit. Investigators have now identified the cause of the failure, and Blue Origin is preparing to launch the next New Glenn mission as soon as next week. The Federal Aviation Administration and Blue Origin announced the closure of the failure investigation May 22. Yesterday, officials confirmed Blue Origin’s next launch will loft a payload of 48 commercial satellites for Amazon’s broadband network in low-Earth orbit.…