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Re:Confronting the Credibility Gap for Crewed Exploration of... by coldtea on Wednesday December 21, 2016 @08:48AM (#13229011)
>How are they going to come back? All realistic plans I've seen are for one-way trips.

Huh?

"The first crewed Mars mission would be expected to have approximately 12 people, with the primary goal to "build out and troubleshoot the propellant plant and Mars Base Alpha power system" as well as a" rudimentary base." In the event of an emergency, the spaceship would be able to return to Earth without having to wait a full 26 months for the next synodic period."

https://en.wikipedia.org/wiki/Interplanetary_Transport_Syste...

Re:Confronting the Credibility Gap for Crewed Exploration of... by chandmer on Wednesday December 21, 2016 @11:26AM (#13230306)
Yep. The spaceship has to come back at the very least.