After cleaning and replacing engine components, SpaceX is gearing up for another try to launch a Falcon 9 rocket Monday on a crucial mission to deliver the SES 8 commercial television broadcasting satellite to orbit. Liftoff from Cape Canaveral's Complex 40 launch pad is set for 5:41 p.m. EST/2:41 p.m. PST (2241 GMT), the opening of an 86-minute launch window.