well, you can use ion engine to do that, even to 100km/s.

well, you can use ion engine to do that, even to 100km/s.

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送交者: steven 于 2007-11-13, 16:25:11:

回答: ok 那以后中土就以这个为目标吧由 deadmeat 于 2007-11-13, 14:39:07:

However, it will take a very very very long time.