Delta 4 – Spaceflight Now

Penultimate Delta rocket to launch next month on ULA’s first mission of 2023

March 22, 2023 Stephen Clark

United Launch Alliance’s second-to-last Delta 4-Heavy rocket is scheduled to blast off from Cape Canaveral April 20 with a classified cargo for the U.S. government’s spy satellite agency, a mission that will mark ULA’s first flight of the year, officials announced this week.

Spy satellite successfully launched from California military base

April 26, 2021 Stephen Clark

A United Launch Alliance Delta 4-Heavy rocket climbed into orbit Monday from a military base northwest of Los Angeles, delivering to space a classified U.S. government spy satellite as large as a school bus and leaving just three Delta rockets left to fly before retirement.

Photos: Delta 4-Heavy rocket awaits liftoff from historic SLC-6 launch pad

April 26, 2021 Stephen Clark

A United Launch Alliance Delta 4-Heavy rocket is awaiting liftoff with a classified U.S. government spy satellite at Vandenberg Air Force Base’s historic Space Launch Complex-6, a picturesque rocket facility that was once intended to support launches of military astronauts and space shuttles.

Live coverage: ULA’s heavy-lift rocket lifts off from California

April 26, 2021 Stephen Clark

A United Launch Alliance Delta 4-Heavy rocket lifted off from Vandenberg Air Force Base in California at 1:47 p.m. PDT (4:47 p.m. EDT; 2047 GMT) Monday with a classified satellite for the National Reconnaissance Office, the U.S. government’s spy satellite agency.

One of ULA’s four remaining Delta 4 rockets set to launch from California

April 25, 2021 Stephen Clark

United Launch Alliance ground crews on California’s Central Coast are gearing up to send a classified U.S. government spy satellite into orbit as soon as Monday — weather permitting — aboard one of the company’s four remaining Delta 4-Heavy rockets.

Delta 4-Heavy rocket erected on Vandenberg launch pad

March 8, 2021 Stephen Clark

United Launch Alliance recently raised a Delta 4-Heavy rocket, one of four left in the company’s backlog, vertical on its launch pad at Vandenberg Air Force Base in California in preparation for liftoff with a top secret U.S. government spy satellite at the end of April.

SpaceX planning launch of two Falcon Heavy missions in summer and fall

February 15, 2021 Stephen Clark

SpaceX plans two Falcon Heavy launches this year for the U.S. Space Force in July and October, and United Launch Alliance has four national security space missions on its 2021 schedule, according to a military spokesperson.

U.S. companies, led by SpaceX, launched more than any other country in 2020

January 5, 2021 Stephen Clark

Leading all other nations, U.S. launch providers flew 44 missions in 2020 that aimed to place payloads in Earth orbit or deep space, with 40 successes. China followed with 35 successful orbital missions in 39 launch attempts.

Lockheed Martin to buy rocket engine-builder Aerojet Rocketdyne

December 21, 2020 Stephen Clark

Lockheed Martin, the largest U.S. defense contractor, announced late Sunday that it has reached a deal valued at $4.4 billion to acquire Aerojet Rocketdyne, a supplier of engines to NASA’s Space Launch System moon rocket and United Launch Alliance’s Atlas, Delta, and Vulcan rockets.

Photos: Delta 4-Heavy rocket lights up Cape Canaveral

December 15, 2020 Stephen Clark

These photos show the fiery liftoff of a United Launch Alliance Delta 4-Heavy rocket from Cape Canaveral on Dec. 10, riding three pillars of flame from its hydrogen-fueled RS-68A main engines.