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The force on a body resulting from it's motion through a fluid (gas or liquid). This force is directly opposed to the direction of travel.

22 votes
5 answers
10k views

Would a fast interstellar spaceship benefit from an aerodynamic shape?

Given the amount of matter in inter-stellar space, at high speed, would it encounter enough of it and frequently enough that an aerodynamic shape would significantly reduce its drag (and thus save fuel …
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