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1. Launch vehicle
The vehicle of choice is the Falcon Heavy rocket, which SpaceX has designed to carry about 30,000 pounds to the vicinity of Mars. The Falcon Heavy’s first demonstration flight is planned for later this year.
NBF – The Mars mission can also use two or more launches of smaller rockets which already exist. Using more smaller rockets would increase cost and complexity
See more and subscribe to NextBigFuture at 2013-03-07 11:01:31 Source: http://nextbigfuture.com/2013/03/four-main-challenges-for-2018-mars.html