> it is the worst of both worlds A thin atmosphere provides an additional option over the alternative of zero atmosphere. Zero atmosphere means you rely entire

> it is the worst of both worlds A thin atmosphere provides an additional option over the alternative of zero atmosphere. Zero atmosphere means you rely entirely on propulsion to slow your arrival, which is inherently expensive. I can agree that a thicker atmosphere would be easier, but a thin atmosphere is better than none. > absurdly complicated and risky 'sky crane' The skycrane was entirely related to not wanting to stir up huge dust plumes around the lander.