NASA’s Artemis II mission crew is currently slingshotting around the moon and heading back to Earth [1].
The return marks the most critical phase of the mission, as the crew must survive the extreme heat and pressure of atmospheric reentry. A successful splashdown will validate the safety of the spacecraft for future lunar landings.
Reentry is described as the scariest part of the mission due to the immense speeds involved [2]. The spacecraft will hit the Earth's atmosphere at approximately 25,000 mph [3]. At this velocity, the heat shield must protect the astronauts from temperatures that could compromise the structural integrity of the capsule.
Rick Henfling and his team in mission control will run the final leg home [4]. The team is monitoring the trajectory to ensure the capsule hits the precise angle required for a safe descent into the splashdown zone [3]. If the angle is too steep, the crew faces excessive G-forces; if it is too shallow, the spacecraft could skip off the atmosphere like a stone on water.
Observers have noted the technical achievement of the journey. "It’s incredible we can do this," said an analyst in a report on the mission's trajectory [2].
The crew is estimated to reach the splashdown zone tomorrow [3]. This phase concludes the primary objectives of the Artemis II flight, which tested the systems necessary for returning humans to the lunar vicinity for the first time in over 50 years.
“The ‘scariest part’ of the mission is the high-speed reentry.”
The successful reentry of Artemis II is a prerequisite for the subsequent Artemis III mission, which intends to land humans on the lunar surface. By proving that the Orion spacecraft can safely transport a crew from deep space back to Earth at interplanetary speeds, NASA establishes the operational baseline for permanent lunar exploration.
