The Pegasus barge, carrying the mighty Space Launch System (SLS) core stage, passes through Port Canaveral on its way to NASAs Kennedy Space Center in Florida on April 27, 2021, after journeying from the agencys Stennis Space Center in Mississippi. The core stage is the final piece of Artemis hardware to arrive at the spaceport and will be offloaded and moved to Kennedys Vehicle Assembly Building, where it will be prepared for integration atop the mobile launcher with the completed stack of solid rocket boosters ahead of the Artemis I launch. The first in a series of increasingly complex missions, Artemis I will test SLS and Orion as an integrated system prior to crewed flights to the Moon.