No doubt there was a lot of eye-rolling at NASA headquarters back in May when the Government Accountability Office faulted the agency for its lack of rigor in estimating life-cycle costs for the heavy-lift Space Launch System (SLS). Certainly no one there who wants to see the big booster built is eager to draw attention to its price tag. But no one knows the costs of SLS or any of the other hardware NASA needs to fulfill its mandate to explore space. The best the National Research Council ...


"Orion Design Changing En Route to Mars" is part of the new Aviation Week & Space Technology subscription, now available online and in our newly launched mobile app.


Current Aviation Week & Space Technology magazine subscribers: online and mobile access are now included at no added charge to you. To read this full article, use your subscriber email to log in to your account (or contact us for assistance in updating your account).



Current Aviation Week Intelligence Network (AWIN) enterprise and individual members: please go to for access.



Not currently a subscriber? Subscribe NOW to our introductory launch special (up to 40% off regular rates), available exclusively at Simply click below to choose your preferred option to receive immediate online and mobile access.


Already registered? here.