Artemis II heat shield checked
- NASA's early inspections say the Artemis II Orion heat shield performed as expected after splashdown. - The capsule re-entered Earth's atmosphere at about 25,000 mph during the mission's return. - Inspectors' findings eased immediate worry but NASA still needs to resolve an Orion helium-leak issue before Artemis III. (orlandosentinel.com; bgr.com)
A heat shield is the sacrificial layer on a spacecraft’s underside, built to burn away in a controlled way so the crew cabin survives reentry. NASA said Orion’s shield did that job on Artemis II, with early inspections finding “no unusual conditions” after splashdown on April 10. (nasa.gov) Orion hit Earth’s atmosphere at nearly 35 times the speed of sound on its return from the Moon, and NASA said the capsule splashed down in the Pacific off California at 8:07 p.m. Eastern on April 10. The Artemis II crew — Reid Wiseman, Victor Glover, Christina Koch and Canadian Space Agency astronaut Jeremy Hansen — had spent about 10 days on the mission. (nasa.gov; nasa.gov; nasa.gov) NASA’s first look matters because Orion’s heat shield came back from the uncrewed Artemis I flight in December 2022 with more char loss than engineers expected. In October 2024, the agency said it had traced that earlier problem to gases getting trapped inside the Avcoat material during reentry. (nasa.gov) For Artemis II, NASA changed the return profile instead of redesigning the shield before the crewed flight. The agency now says the char loss seen after splashdown was “significantly reduced” compared with Artemis I, both in amount and in the size of the missing pieces. (nasa.gov; orlandosentinel.com) Engineers are not done with the inspection. NASA said the crew module will return to Kennedy Space Center this month for de-servicing and more examination, and the heat shield will go this summer to Marshall Space Flight Center in Huntsville, Alabama, for sample extraction and internal X-ray scans. (nasa.gov; orlandosentinel.com) NASA is treating those findings as support for Artemis III, the next mission in the program and the one aimed at putting astronauts near the Moon’s south pole. The agency says Artemis II “laid the groundwork” for that third mission, which NASA has described as planned for next year. (nasa.gov; houstonpublicmedia.org) One hardware issue still hanging over the program involves helium, the gas used to pressurize propellant systems. NASA said on March 3 that it had repaired a helium-flow problem in the Space Launch System upper stage after rolling the rocket back to the Vehicle Assembly Building, and outside reports have said Orion also faces a separate helium-leak issue that must be closed before Artemis III. (nasa.gov; bgr.com) The immediate question after splashdown was whether Orion’s most visible weak point from Artemis I had shown up again. NASA’s answer, for now, is no: the shield behaved as expected, and the deeper teardown will decide how much margin the spacecraft really has before the next trip to the Moon. (nasa.gov)
