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If we built a ridiculously huge rocket 10x the size of Burj Dubai, how long would it take it to reach Alpha Proxima?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
If we built a ridiculously huge rocket 10x the size of Burj Dubai, how long would it take it to reach Alpha Proxima?	1
Wouldn't it be more efficient if a rocket pushed off of the jettisoned parts it discards?	0