NASA has been forced to postpone the launch of shuttle Discovery towards the International Space Station (ISS) due to a gas leak found while the launch team was fueling up the shuttle for its launch tonight.
The problem wasn't discovered until launch pad workers started putting more than a half-million gallons of liquid hydrogen and liquid oxygen into the shuttle's external fuel tank around lunch time today. The problem involves a leak that was "detected in a gaseous hydrogen (GH2) vent line," the NASA web site reads.
"The vent line is at the intertank region of the external tank and is the overboard vent to the pad and the flare stack where the vented hydrogen is burned off."
Originally scheduled to be launched at 9:20:10 p.m. EST tonight from the Kennedy Space Center, the weather was scheduled to be perfect for a launch. Shuttle Discovery will head into space to help install the power system aboard the ISS and deliver a JAXA astronaut who will work on the ISS.
The launch of shuttle Discovery, NASA's first manned launch of 2009, has been delayed more than one month due to the hydrogen gas valves aboard the shuttle. This fuel incident took place somewhere outside the shuttle and doesn't involve the troublesome gas valves, NASA said.
NASA hopes to launch the shuttle tomorrow evening.