| http://www.w3.org/ns/prov#value | - But the heat shield needed to be rotated in order to keep it from getting too cold and deteriorating (shredding is a better word).he is the reason why the extra-long entry blackout was more worrisome than anything else on Apollo 13 -- that spacecraft had used a very badly controlled PTC on its way back to Earth, and by the end the CM and LM were mostly in shadow, with the sun shining mostly down
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