the third flight of SLS would again be a Block 1 variant carrying the first crewed mission Orion. A fourth Block 1 flight on the manifest may yet be needed before the EUS and ML-2 are ready.

Instead of being retired after one launch, the Block 1 configuration could fly multiple times. The first two candidates to fly on the second SLS launch are the first crewed Orion on a Lunar ...

It would still fall short of the mighty Saturn V’s 155 tons to LEO, but the proposed “Block 2 ... Mission 1”, the SLS is only responsible for getting the Orion, its Service Module ...

The core stage of NASA's next Space Launch System (SLS) rocket recently completed integration with the vehicle's side ...

The test won’t include the SLS rocket, but the Orion will be fixed to a booster that will send it up to 31,000 feet so that engineers can ensure the abort system functions as intended under load.