The American National Aeronautics and Space Administration (NASA) has once again delayed the launch of the space shuttle Endeavour.
Endeavour was rescheduled to be launched on Monday after Friday's event was canceled because of an electronics problem, reported Sky News on its website.
The problem concerned the heating system on one of the ship's hydraulic power generators which brought a halt to the countdown.
The heaters keep fuel from freezing in the line, preventing it from rupturing in the cold vacuum of space.
"The trouble-shooting that was done overnight doesn't seem to indicate that it's one of the simple things," NASA spokesman Mike Curie said.
When the shuttle finally takes off, it will deliver an Alpha Magnetic Spectrometer particle detector to the International Space Station that will scour the universe for clues as to how it began.
Endeavour's flight, when it takes place, will be its 25th and the last but one of a shuttle as the US space shuttle program closes for good.
Following its closure, Russia will be left as the sole taxi for astronauts heading to and from the orbiting space lab until a new spaceship is built by a partnership between NASA and private companies, by 2015 at the earliest.