Henry Spencer quote ✍️

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Supplying fuel for a Mars expedition from the lunar surface is often suggested, but it's hard to make it pay off - Moon bases are expensive, and just buying more rockets to launch fuel from Earth is relatively cheap.
Henry Spencer moon earth mars

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Often perfumed powder
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Hint 1 meaning
A soft mineral of a soapy feel and a greenish, whitish, or grayish color, usually occurring in foliated masses. It is hydrous silicate of magnesia. Steatite, or soapstone, is a compact granular variety.
Hint 2 anagram
ALTC
Hint 3 another clue
BABY DOCTOR FOR SHORT
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