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Newest Update: Dec. 4, 2014, 8:38 p.m.
After three failed attempts on Thursday (two due to wind and one due to sticky hydrogen fuel valves on the Delta IV rocket), NASA will give it another go on Friday morning at 7:05 EST, according to the Orion Spacecraft (@NASA_Orion). The valves most likely became "cold and a little sluggish" after the first two delays, according to the Washington Post. At a press conference on Thursday, NASA said it will ensure it has "a happy rocket," according to AL.
Update: Dec. 4, 2014, 9:35 a.m. EST
The Orion Spacecraft (@NASA_Orion) tweeted at 9:35 a.m. "The #Orion launch is scrubbed for today. Next launch opportunity in 24 hours." The capsule and rockets were systematically secured and shut down. "The launch team is resetting for a launch tomorrow morning," NASA wrote on Orion's website.
Update: Dec. 4, 2014, 9:35 a.m. EST
Scrub successful and latches are rest. The final launch attempt is set for 9:44 a.m. EST.
Update: Dec. 4, 2014, 9:05 a.m. EST
Hydrogen boosters will be drained and refilled. This will affect the common booster core (CBC) and take about two minutes. Launch window still open for about another 40 minutes.
Update: Dec. 4, 2014, 8:47 a.m. EST
Valves checked on CBC, port and the core. Starboard is complete. Lock cycle complete. The team is working on troubleshooting on the port and core.
Update: Dec. 4, 2014, 8:40 a.m. EST
Several issues, including a boat downrange from Cape Canaveral and high winds at ground level, have caused delays in the Orion launch. A second launch time was set, but called off due to high winds. Another launch time was set for 8:26 a.m., but the launch was again postponed when "a fuel and a drain valve" failed to close minutes before lift-off. The launch window extends through 9:44 a.m. EST, so there is a still a chance that the launch will happen today.
