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Cake day: June 10th, 2023

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  • Interesting speculation on SLS and potential changes to the Artemis architecture:

    Multiple sources have told Ars that the SLS rocket—which has long had staunch backing from Congress—is now on the chopping block. No final decisions have been made, but a tentative deal is in place with lawmakers to end the rocket in exchange for moving US Space Command to Huntsville, Alabama.

    So how would NASA astronauts get to the Moon without the SLS rocket? Nothing is final, and the trade space is open. One possible scenario being discussed for future Artemis missions is to launch the Orion spacecraft on a New Glenn rocket into low-Earth orbit. There, it could dock with a Centaur upper stage that would launch on a Vulcan rocket. This Centaur stage would then boost Orion toward lunar orbit.



  • Disappointing, but not a big surprise. At least they’ve finally shared some info on the heatshield issue:

    Although the launch and lunar laps went well, the capsule returned with an excessively charred and eroded bottom heat shield, damaged from the heat of reentry. It took until recently for engineers to pinpoint the cause and come up with a plan.

    NASA will use the Orion capsule with its original heat shield for the next flight with four astronauts, according to Nelson, but make changes to the reentry path at flight’s end. To rip off and replace the heat shield would have meant at least a full year’s delay and stalled the moon landing even further, officials said.

    During the flight test, NASA had the capsule dip in and out of the atmosphere during reentry, and gases built up in the heat shield’s outer layer, officials said. That resulted in cracking and uneven shedding of the outer material.

    When they say “NASA will use the Orion capsule with its original heat shield for the next flight”, are they referring to the original design, or the actual original Artemis I heatshield which has been charred and eroded?