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For questions involving implemented theory or technology for travelling through space. Consider also [space-travel]. See also the tag information (click "info") for more details on when this tag applies.
11
votes
Can there be a space age without petroleum (crude oil)?
Yes but it would be harder. Werrf's answer is correct. You need an abundant and fairly cheap source of energy. Without it technological progress is slow. I think Werrf concentrates too much on replaci …
16
votes
Where is the best place to park your damaged spaceship, longterm?
The answer depends on what close means.
If your spacecraft can make a "modest effort at station keeping" park it in a halo orbit near the first or second Lagrange point between the planet and the sun …