This is the rocket that literally lights itself on fire before it heads to space. It’s the world’s largest rocket entirely fueled by liquid hydrogen, a propellant that is vexing to handle but ...

Thursday’s launch has been scrubbed. Officials said they will make another attempt to launch the rocket at 1:37 p.m. Friday. The rocket will carry the NROL-70 mission for the National Reconnaissance ...

At 2:47 p.m. EDT Thursday, March 28, ULA called a scrub. Previously, it was scheduled for 2:45 p.m. EDT, 1:40 p.m. EDT and 2:03 p.m. EDT. Next attempt is TBD. The Delta IV Heavy rocket, which had been ...

Delta IV Heavy rocket has 3 Delta IV core stages. Each rocket engine produces up to 702,000 pounds of thrust. The engines aren't small: Just one engine weighs about 14,876 pounds and is 17 feet in ...

Delta IV Heavy made its debut during December 2004 demo flight from Florida's Launch Complex 37. United Launch Alliance's last Delta IV Heavy triple-core rocket will launch on the NROL-70 national ...