The countdown continues for Thursday’s launch of the United Launch Alliance’s Delta IV Heavy rocket carrying the NROL-70 mission for the National Reconnaissance Office.

The Delta IV Heavy rocket will lift off from Cape Canaveral, Florida, with a classified payload on the NROL-70 national security mission, conducted in tandem with the National Reconnaissance ...

Today's Delta IV Heavy launch closed out the rocket program after 389 flights. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

Fiery scenes from a Sept. 24, 2022, liftoff of a Delta IV Heavy rocket. Video by United Launch Alliance The Delta IV Heavy burns ultracold liquid hydrogen, which is a high-performance fuel.

ULA’s new Vulcan Centaur rocket, which debuted in January, is designed to replace the Deltas. The two-stage Delta IV Heavy consists of three booster cores, each powered by a RS-68A engine.

But the Delta IV Heavy is expensive. At one time, a single launch on this expendable rocket cost as much as $400 million, although the government secured a somewhat lower price from ULA for buying ...

The Advanced Orion satellites require the combination of the Delta IV Heavy rocket’s lift capability, long-duration upper stage, and huge, 65-foot-long (19.8-meter) trisector payload fairing ...

At 233 feet tall, the Delta IV Heavy would tower above the first Delta rocket at just 90 feet tall. Ultimately, the first Delta launch in 1960 was not a success. However, the Delta rocket quickly ...

Delta IV Heavy, we're ready for your fiery − and final − show. The last launch ever for United Launch Alliance's powerful rocket is one you won't want to miss. The Delta IV Heavy rocket will ...

The Delta IV Heavy is always a spectacular launch thanks to 2.2 million pounds of thrust and an interesting quirk at launch that makes it look like the rocket is on fire. “To me, it is kind of sad.