What key test did the Orion capsule undergo during its lunar flyby?

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Orion Capsule Successfully Tested Crucial Lunar Flyby Maneuvers

Nasa's Orion capsule successfully completed a critical lunar flyby, coming within 130 kilometers of the Moon's surface. This close pass tested essential maneuvers that will be employed in future Artemis missions carrying astronauts. The capsule's journey back to Earth commenced following a three-minute engine burn from its European Service Module, setting its course after spending approximately six days in a distant retrograde orbit around the Moon.
Communication Tested During Lunar Far Side Transit

During the mission's close lunar flyby, communication with the Orion capsule was temporarily lost for 30 minutes. This interruption occurred when the spacecraft was positioned behind the far side of the Moon, a region characterized by its extensive cratering. Restoring communication upon re-emergence from behind the Moon was a significant milestone.
Engine Burn Set Course for Earth Return

The European Service Module's main engine was activated for over three minutes to precisely orient the Orion capsule for its return trajectory to Earth. This engine firing represented the final major maneuver of the Artemis-1 mission, which launched on November 16 from Florida aboard the Space Launch System (SLS) rocket. The entire mission is designed to span a total of 25 and a half days.
Orion Achieved Record Distance and Prepares for Re-entry

Earlier in its mission, Orion established a new distance record for a habitable capsule, reaching a maximum of 450,000 kilometers from Earth. Upon its completion, the spacecraft will have traveled over 1.4 million miles. The return to Earth will culminate in a splashdown in the Pacific Ocean off San Diego on December 11, where its heat shield will face temperatures approaching 2,800 degrees Celsius during atmospheric re-entry.

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What key test did the Orion capsule undergo during its lunar flyby?

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