Photos: Delta 4-Heavy with Orion on eve of launch

The splashdown of Orion in the Pacific Ocean concludes the EFT-1 shakedown cruise for NASA’s new space capsule.

In a major shift, NASA is considering using two commercial launchers to send an unpiloted Orion crew capsule and its European-built service module on a test flight around the moon next year, maintaining the lunar test flight’s schedule despite fresh delays in the development of the multibillion-dollar Space Launch System that jeopardize the heavy-lifter’s 2020 inaugural flight, the agency’s administrator said in a congressional hearing Wednesday.

The 330-foot tall mobile service tower has been retracted from the Delta 4-Heavy rocket at Cape Canaveral’s pad 37B for tomorrow morning’s launch that will place the Orion spacecraft on its intended trajectory.