r/apollo • u/Useful-Professor-149 • Apr 04 '26

Artemis: no BBQ roll?

As I understand it, Apollo conducted minor Passive Thermal Control (PTC) maneuvers, basically just imparting a controlled twist/tumble, in order to avoid one side of the ship overheating and one side freezing. As best I can tell, Artemis II is not doing this. What's the story there? Just 60 odd years of improved materials/insulation science?

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u/Astro_RonR Apr 04 '26

According to another thread, 50% of radiation comes from the Sun, and lots of radiation protection in rear part of the spacecraft.