SpaceX’s upgraded Dragon capsules will not return astronauts to Earth for powered landings as originally envisioned, company boss Elon Musk said Wednesday, a design change that raises questions about the space transport firm’s plans to send commercial landers to the surface of Mars.

Japan’s third navigation satellite rode an H-2A rocket into orbit Saturday from the Tanegashima Space Center in southern Japan, one week after officials aborted a countdown to resolve a helium leak in the vehicle’s first stage. Liftoff occurred at 0529 GMT (1:29 a.m. EDT) Saturday.

NASA has announced a one-day delay in SpaceX’s next cargo launch until Wednesday to allow time for ground teams to replace moldy food bars meant for 40 mice heading for the International Space Station as part of a biological research experiment, denying the launch company a chance at two Falcon 9 missions on back-to-back days.