Artemis II SM Move to Fast Cell. A view looking up from beneath the European Service Module (ESM) for NASAs Artemis II mission as it is moved by crane along the center aisle of the high bay inside the Neil A. Armstrong Operations and Checkout Building at NASAs Kennedy Space Center in Florida on May 22, 2023. Teams from NASA and Lockheed Martin are transferring the service module to the FAST (final assembly and system testing) cell for final checkouts before it is stacked with the Orion crew module.. The powerhouse that will fuel and propel Orion in space, the ESM will be used for Artemis II, the first Artemis mission flying crew aboard Orion.