Washington (AFP) – The latest test of NASA’s giant Moon rocket SLS has been pushed back to allow for a SpaceX rocket to launch later this week, the US space agency announced Tuesday. The dress rehearsal for the giant Space Launch System had been scheduled for Friday at launch pad 39B at Cape Canaveral, Florida, at the same time as SpaceX’s lift-off from pad 39A. The test of the rocket, which is to return humans to the Moon, is now expected to resume shortly after the take-off of the SpaceX flight, which is to carry three businessmen and a former astronaut to the International Space Station. T…