Only three 4000- and one 5000-series rockets launched, but they led the way to the Delta II, which flew in Lite and Heavy configurations. Evolution of the Delta family of rockets.

The Delta IV Heavy will certainly have a legacy of launching national security missions, ... The last of that older family of Delta rockets, the Delta II, launched for the final time in 2018.

The Delta II retired in 2018 with the last medium-lift version of the Delta IV flying in 2019. The Delta IV Heavy, which had flown 15 times before this launch since its debut in 2004, was the lone ...

The 235-foot-tall Delta IV Heavy rocket will send up the top-secret NROL-70 mission for the National Reconnaissance Office (NRO). The liftoff will take place from Space Launch Complex-37 at Cape ...

It's the final countdown for Delta IV Heavy, United Launch Alliance's powerful rocket. You can "see" it on your iPhone, Android, flatscreen or tablet.

A United Launch Alliance Delta IV Heavy lifts off from Cape Canaveral Space Force Station, Fla., Thursday, June 22, 2023, carrying a payload for the National Reconnaissance Office.

Delta IV Heavy features three common booster core tanks, which power a RS-68A engine system built by Aerojet Rocketdyne. RS-68A is the largest hydrogen-burning engine in existence, according to ULA.

Delta Heavy refers to United Launch Alliance's Delta IV Heavy rocket. ... The Orion spacecraft is set to take Artemis II astronauts around the Moon in late 2025.

The Delta IV Heavy is making its 16th flight having been introduced in 2004. The medium-lift version of the Delta IV last flew in 2019 while the smaller, older Delta II rocket retired in 2018.

This will be the Delta IV Heavy’s 16th and final launch. In its near 20-year history, it has performed mostly classified missions for the U.S. government and all 15 missions were considered ...

A United Launch Alliance Delta IV-Heavy rocket lifts off from Cape Canaveral, Fla., June 11, 2016. (United Launch Alliance) ...