NASA's Artemis II Mission Nears Critical Splashdown Phase

NASA's Artemis II mission is nearing its final stage, with the Orion spacecraft set for a high-speed return to Earth and splashdown in the Pacific Ocean. The mission is a critical test for systems that the space agency plans to use in future crewed moon landings, including Artemis III.

The splashdown, scheduled for April 11 at about 00:07 GMT (8:07pm ET on April 10), will mark the first time since Apollo 17 in 1972 that NASA and the Department of Defense are recovering a crewed spacecraft returning from the moon. The Orion spacecraft, named Integrity by the crew, will re-enter the atmosphere and splash down off the San Diego coast.

NASA has set strict 'go' conditions for splashdown, including wave heights below six feet (1.8 meters), winds under 28.7mph (46 km/h), and no rain or lightning within a 30-nautical-mile radius. Clear visibility is also essential for tracking Orion and safely recovering the astronauts.

The Orion spacecraft will come hurtling back to Earth, hitting the atmosphere at about 34,965 feet (10,657 meters) per second, roughly 23,800mph (38,300km/h), fast enough to travel from New York to Tokyo in less than 20 minutes. The spacecraft's heat shield, a critical component, will protect it from temperatures of up to 2,700 degrees Celsius (4,900 degrees Fahrenheit).

The mission has raised concerns about the heat shield's performance, with some experts questioning its safety. However, NASA officials say they are confident in the shield's ability to protect the crew and have adjusted the re-entry path to limit stress on the shield.

The splashdown and recovery will be broadcast live on NASA+, the NASA app, and YouTube channel. A detailed timeline for the final stages of the mission has been outlined, including the crew wakeup, cabin configuration, trajectory correction, module separation, atmospheric entry, communication blackout, and splashdown.